Wechselwirkungen von Dronedaron

• CYP3A Inhibitors: Avoid co-administration with strong CYP3A inhibitors. (Fachinformation zu Acalabrutinib, Arzneimittelwechselwirkungen)

…(Childs-Pugh categories B and C), since alfuzosin blood levels are increased in these patients [see Use in Specific Populations (8.7) and Clinical Pharmacology (12.3) ]. with potent CYP3A4 inhibitors such as ketoconazole, itraconazole, and ritonavir, since alfuzosin blood levels are increased [see Drug Interactions (7.1) and Clinical Pharmacology (12.3) ] . in… (Fachinformation zu Alfuzosin, Gegenanzeigen)

Concomitant use of almotriptan tablets and potent CYP3A4 inhibitors should be avoided in patients with renal or hepatic impairment [see Clinical Pharmacology ( 12.3 )] . (Fachinformation zu Almotriptan, Arzneimittelwechselwirkungen)

• taking strong cytochrome P450 3A (CYP3A) inhibitors (e.g., ketoconazole, itraconazole), except ritonavir [see Dosage and Administration (2.5) , Warnings and Precautions (5.5) , Drug Interactions (7.1) ] . (Fachinformation zu Alprazolam, Gegenanzeigen)

…phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or PR interval >280 ms • Severe hepatic impairment • Hypersensitivity to the active substance or to any of the excipients • Permanent AF (patients… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

For patients receiving ELIQUIS at a dose of 2.5 mg twice daily, avoid coadministration with combined P-gp and strong CYP3A4 inhibitors [see Dosage and Administration (2.6) and Clinical Pharmacology (12.3) ] . (Fachinformation zu Apixaban, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Drug Class Drugs within class that are contraindicated with REYATAZ Alpha 1-adrenoreceptor antagonist Alfuzosin Anticonvulsants Carbamazepine, phenobarbital, phenytoin Antiarrhythmics Amiodarone (with ritonavir), quinidine (with ritonavir) Antimycobacterials Rifampin Antineoplastics Apalutamide, encorafenib, irinotecan, ivosidenib Antipsychotics Lurasidone (with… (Fachinformation zu Atazanavir, Gegenanzeigen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Fachinformation zu Avanafil, Arzneimittelwechselwirkungen)

…drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or PR interval >280 ms • Severe… (Fachinformation zu Dronedaron, Gegenanzeigen)

Concomitant administration of BIXLENVO with combined P-gp, UGT1A1, and strong CYP3A inhibitors is not recommended. (Fachinformation zu Bictegravir, Emtricitabin und Tenofoviralafenamid, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Strong and Moderate CYP3A Inhibitors: Avoid concomitant use with BOSULIF. (Fachinformation zu Bosutinib, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Concomitant use of strong CYP3A4 inhibitors (e.g., azole antimycotics, HIV protease inhibitors) with CYCLOSET should be avoided. (Fachinformation zu Bromocriptin, Arzneimittelwechselwirkungen)

Evaluate patients starting CYP3A4 inhibitors or stopping CYP3A4 inducers at frequent intervals for respiratory depression. (Fachinformation zu Buprenorphin, Arzneimittelwechselwirkungen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. (Fachinformation zu Butalbital, Acetylsalicylsäure, Koffein und Codein, Boxed Warning (umrahmter Warnhinweis))

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. (Fachinformation zu Butalbital, Paracetamol, Koffein und Codein, Boxed Warning (umrahmter Warnhinweis))

Avoid taking a strong CYP3A4 inhibitor (e.g., ketoconazole, itraconazole, clarithromycin, atazanavir, indinavir, nefazodone, nelfinavir, ritonavir, saquinavir, telithromycin, voriconazole) while taking COMETRIQ or reduce the dosage of COMETRIQ if concomitant use with strong CYP3A4 inhibitors cannot be avoided [see Dosage and Administration ( 2.2 ), Clinical Pharmacology… (Fachinformation zu Cabozantinib, Arzneimittelwechselwirkungen)

Rifampin and Other CYP3A Inducers Avoid rifampin or other CYP3A inducers such as phenobarbital, carbamazepine, phenytoin, and St. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Proarrhythmic effects Like many other drugs (including all other Class Ia antiarrhythmics), quinidine prolongs the QT c interval, and this can lead to torsades de pointes , a life-threatening ventricular arrhythmia (see OVERDOSAGE ). (Fachinformation zu Chinidin, Warnhinweise)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…(except when used in conjunction with a functioning pacemaker) • Bradycardia <50 bpm • Concomitant use of strong CYP3A inhibitors, such as ketoconazole, itraconazole, voriconazole, cyclosporine, telithromycin, clarithromycin, nefazodone, and ritonavir [see Drug Interactions (7.2) ] • Concomitant use of erythromycin [see Clinical Pharmacology (12.3) ] • Concomitant… (Fachinformation zu Dronedaron, Gegenanzeigen)

Avoid use in patients with known prolongation, those with hypokalemia, and with other drugs that prolong the QT interval. (Fachinformation zu Ciprofloxacin, Warnhinweise und Vorsichtsmaßnahmen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

…drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or PR interval >280 ms • Severe… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. (Fachinformation zu Codein, Boxed Warning (umrahmter Warnhinweis))

Patients with renal or hepatic impairment should not be given colchicine capsules with drugs that inhibit both P-glycoprotein and CYP3A4 inhibitors [see Drug Interactions (7) ] . (Fachinformation zu Colchicin, Gegenanzeigen)

In patients with severe renal impairment (CrCL 15–30 mL/min), concomitant use of dronedarone with dabigatran should be avoided. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Strong CYP3A4 inhibitors: Avoid concomitant use. (Fachinformation zu Daridorexant, Arzneimittelwechselwirkungen)

Alpha 1-adrenoreceptor antagonist: alfuzosin Anti-gout: colchicine, in patients with renal and/or hepatic impairment Antimycobacterial: rifampin Antipsychotics: lurasidone, pimozide Cardiac Disorders: dronedarone, ivabradine, ranolazine Ergot derivatives, e.g. dihydroergotamine, ergotamine, methylergonovine Herbal product: St. (Fachinformation zu Darunavir, Gegenanzeigen)

…antagonist: alfuzosin Anticonvulsants: carbamazepine, phenobarbital, phenytoin Anti-gout: colchicine, in patients with renal and/or hepatic impairment Antimycobacterial: rifampin Antipsychotics: lurasidone, pimozide Cardiac Disorders: dronedarone, ivabradine, ranolazine Ergot derivatives, e.g. dihydroergotamine, ergotamine, methylergonovine Herbal product: St. (Fachinformation zu Darunavir und Cobicistat, Gegenanzeigen)

Avoid concomitant use of strong CYP3A4 inhibitors. (Fachinformation zu Dasatinib, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

QT Prolongation: Monitor ECG if concomitant use of drugs that prolong QT interval cannot be avoided or if concomitant CYP3A4 inhibitors used. (Fachinformation zu Dextromethorphan und Chinidin, Warnhinweise und Vorsichtsmaßnahmen)

Digoxin In the ANDROMEDA (patients with recently decompensated heart failure) and PALLAS (patients with permanent AF) trials baseline use of digoxin was associated with an increased risk of arrhythmic or sudden death in dronedarone-treated patients compared to placebo. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

WARNING: PERIPHERAL ISCHEMIA FOLLOWING COADMINISTRATION WITH POTENT CYP3A4 INHIBITORS Serious and/or life-threatening peripheral ischemia has been associated with the coadministration of dihydroergotamine with potent CYP3A4 inhibitors including protease inhibitors and macrolide antibiotics. (Fachinformation zu Dihydroergotamin, Boxed Warning (umrahmter Warnhinweis))

Considering the known proarrhythmic properties of Norpace or Norpace CR and the lack of evidence of improved survival for any antiarrhythmic drug in patients without life-threatening arrhythmias, the use of Norpace or Norpace CR as well as other antiarrhythmic agents should be reserved for patients with life-threatening ventricular arrhythmias. (Fachinformation zu Disopyramid, Boxed Warning (umrahmter Warnhinweis))

Concomitant use of Docetaxel Injection and drugs that inhibit CYP3A4 may increase exposure to docetaxel and should be avoided. (Fachinformation zu Docetaxel, Arzneimittelwechselwirkungen)

Use with Drugs that Prolong QT Interval and Antiarrhythmic Agents The use of dofetilide in conjunction with other drugs that prolong the QT interval has not been studied and is not recommended. (Fachinformation zu Dofetilid, Warnhinweise)

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

Avoid concomitant use of Doxorubicin Hydrochloride Injection with inhibitors of CYP3A4, CYP2D6, or P-gp. (Fachinformation zu Doxorubicin, Arzneimittelwechselwirkungen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Drug-Drug Interactions Strong Inhibitors of Cytochrome P450 (CYP) 3A4 Tamsulosin-containing products, including JALYN, should not be coadministered with strong CYP3A4 inhibitors (e.g., ketoconazole) as this can significantly increase tamsulosin exposure [see Drug Interactions (7.1) , Clinical Pharmacology (12.3) ]. (Fachinformation zu Dutasterid und Tamsulosin, Warnhinweise und Vorsichtsmaßnahmen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Recent use (i.e., within at least 72 hours) of the following potent CYP3A4 inhibitors: ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir, or nelfinavir [see Drug Interactions (7.2) and Clinical Pharmacology (12.3) ]. (Fachinformation zu Eletriptan, Gegenanzeigen)

Concomitant use of COMPLERA with drugs with a known risk to prolong the QTc interval of the electrocardiogram may increase the risk of Torsade de Pointes. (Fachinformation zu Emtricitabin, Rilpivirin und Tenofovir, Warnhinweise und Vorsichtsmaßnahmen)

…Patients Eplerenone is contraindicated in all patients with: • serum potassium > 5.5 mEq/L at initiation, • creatinine clearance ≤ 30 mL/min, or • concomitant administration of strong CYP3A inhibitors (e.g., ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir, and nelfinavir) [see Drug Interactions (7.1) , Clinical Pharmacology (12.3)… (Fachinformation zu Eplerenon, Gegenanzeigen)

WARNING Serious and/or life-threatening peripheral ischemia has been associated with the coadministration of ergotamine tartrate and caffeine tablets with potent CYP 3A4 inhibitors including protease inhibitors and macrolide antibiotics. (Fachinformation zu Ergotamin und Koffein, Boxed Warning (umrahmter Warnhinweis))

Avoid co-administering erlotinib with strong CYP3A4 inhibitors (e.g., boceprevir, clarithromycin, conivaptan, indinavir, itraconazole, ketoconazole, lopinavir/ritonavir, nefazodone, nelfinavir, posaconazole, ritonavir, saquinavir, telithromycin, voriconazole, grapefruit or grapefruit juice) or a combined CYP3A4 and CYP1A2 inhibitor (e.g., ciprofloxacin). (Fachinformation zu Erlotinib, Arzneimittelwechselwirkungen)

• Concomitant use of erythromycin ( 4 ) (Fachinformation zu Dronedaron, Gegenanzeigen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Consequently, estazolam should be avoided in patients receiving ketoconazole and itraconazole, which are very potent inhibitors of CYP3A (see CONTRAINDICATIONS ). (Fachinformation zu Estazolam, Warnhinweise)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Strong CYP3A inhibitor and P-gp inhibitor : Avoid coadministration. (Fachinformation zu Everolimus, Arzneimittelwechselwirkungen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Concomitant use with CYP3A4 inhibitors (or discontinuation of CYP3A4 inducers) can result in a fatal overdose of fentanyl. (Fachinformation zu Fentanyl, Boxed Warning (umrahmter Warnhinweis))

CYP3A4 Inhibitors Doses of Toviaz greater than 4 mg are not recommended in adult patients taking strong CYP3A4 inhibitors, such as ketoconazole, itraconazole, and clarithromycin [see Dosage and Administration (2.5) ]. (Fachinformation zu Fesoterodin, Arzneimittelwechselwirkungen)

…drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or PR interval >280 ms • Severe… (Fachinformation zu Dronedaron, Gegenanzeigen)

Contraindicated with Strong or Moderate CYP3A4 Inhibitors The concomitant use of ADDYI and moderate or strong CYP3A4 inhibitors increases flibanserin concentrations, which can cause severe hypotension and syncope [see Warnings and Precautions (5.2) ] . (Fachinformation zu Flibanserin, Boxed Warning (umrahmter Warnhinweis))

Coadministration of other drugs known to prolong the QT interval and which are metabolized via the enzyme CYP3A4 such as erythromycin, pimozide, and quinidine are contraindicated in patients receiving fluconazole. (Fachinformation zu Fluconazol, Gegenanzeigen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Strong cytochrome P450 3A4 inhibitors (e.g., ritonavir, ketoconazole): Use not recommended. (Fachinformation zu Fluticason, Arzneimittelwechselwirkungen)

Avoid strong cytochrome P450 3A4 inhibitors (e.g., ritonavir, ketoconazole): May increase risk of systemic corticosteroid and cardiovascular effects. (Fachinformation zu Fluticason und Salmeterol, Arzneimittelwechselwirkungen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Fosamprenavir calcium is contraindicated when coadministered with the following drugs: Alpha 1-adrenoreceptor antagonist: Alfuzosin Antiarrhythmics: Flecainide (with ritonavir ), propafenone (with ritonavir ) Antimycobacterial: Rifampin Antipsychotic: Lurasidone (with ritonavir ), pimozide Ergot derivatives: Dihydroergotamine, ergonovine, ergotamine, methylergonovine… (Fachinformation zu Fosamprenavir, Gegenanzeigen)

(See DOSAGE and ADMINISTRATION. ) Because of the risk of QT prolongation and the potential for torsades de pointes, the use of FOSCAVIR should be avoided in combination with agents known to prolong the QT interval including Class IA (e.g., quinidine or procainamide) or Class III (e.g., dofetilide, amiodarone, sotalol) antiarrhythmic agents, phenothiazines, tricyclic… (Fachinformation zu Foscarnet, Arzneimittelwechselwirkungen)

Avoid co-administration of CONTEPO with drugs known to prolong the QT interval. (Fachinformation zu Fosfomycin, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Grapefruit juice: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Cytochrome P450 3A4 Interaction The concomitant use of HYSINGLA ER with all cytochrome P450 3A4 inhibitors may result in an increase in hydrocodone plasma concentrations, which could increase or prolong adverse reactions and may cause potentially fatal respiratory depression. (Fachinformation zu Hydrocodon, Boxed Warning (umrahmter Warnhinweis))

Cytochrome P450 3A4 Interaction The concomitant use of Hydrocodone Polistirex and Chlorpheniramine Polistirex with all cytochrome P450 3A4 inhibitors may result in an increase in hydrocodone plasma concentrations, which could increase or prolong adverse drug effects and may cause potentially fatal respiratory depression. (Fachinformation zu Hydrocodon und Chlorphenamin, Boxed Warning (umrahmter Warnhinweis))

Cytochrome P450 3A4 Interaction The concomitant use of hydrocodone bitartrate and homatropine methylbromide with all cytochrome P450 3A4 inhibitors may result in an increase in hydrocodone plasma concentrations, which could increase or prolong adverse drug effects and may cause potentially fatal respiratory depression. (Fachinformation zu Hydrocodon und Homatropin, Boxed Warning (umrahmter Warnhinweis))

Cytochrome P450 3A4 Interaction The concomitant use of Hydrocodone Bitartrate and Ibuprofen Tablets with all cytochrome P450 3A4 inhibitors may result in an increase in hydrocodone plasma concentrations, which may cause potentially fatal respiratory depression. (Fachinformation zu Hydrocodon und Ibuprofen, Boxed Warning (umrahmter Warnhinweis))

Cytochrome P450 3A4 Interaction The concomitant use of hydrocodone bitartrate and acetaminophen tablets with all Cytochrome P450 3A4 inhibitors may result in an increase in hydrocodone plasma concentrations, which could increase or prolong adverse reactions and may cause potentially fatal respiratory depression. (Fachinformation zu Hydrocodon und Paracetamol, Boxed Warning (umrahmter Warnhinweis))

Therefore, PLAQUENIL is not recommended in patients taking other drugs that have the potential to prolong the QT interval. (Fachinformation zu Hydroxychloroquin, Warnhinweise und Vorsichtsmaßnahmen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

• Strong CYP3A4 Inhibitors: Do not administer strong CYP3A4 inhibitors with CAMPTOSAR. (Fachinformation zu Irinotecan, Arzneimittelwechselwirkungen)

…block, or sick sinus syndrome (except when used in conjunction with a functioning pacemaker) • Bradycardia <50 bpm • Concomitant use of strong CYP3A inhibitors, such as ketoconazole, itraconazole, voriconazole, cyclosporine, telithromycin, clarithromycin, nefazodone, and ritonavir [see Drug Interactions (7.2) ] • Concomitant use of erythromycin [see Clinical Pharmacology… (Fachinformation zu Dronedaron, Gegenanzeigen)

…bradycardia [see Warnings and Precautions ( 5.3 )] • Severe hepatic impairment [see Use in Specific Populations ( 8.6 )] • Pacemaker dependence (heart rate maintained exclusively by the pacemaker) [see Drug Interactions ( 7.3 )] • Concomitant use of strong cytochrome P450 3A4 (CYP3A4) inhibitors [see Drug Interactions ( 7.1 )] Acute decompensated heart failure ( 4 ) (Fachinformation zu Ivabradin, Gegenanzeigen)

…atrioventricular (AV) block, or sick sinus syndrome (except when used in conjunction with a functioning pacemaker) • Bradycardia <50 bpm • Concomitant use of strong CYP3A inhibitors, such as ketoconazole, itraconazole, voriconazole, cyclosporine, telithromycin, clarithromycin, nefazodone, and ritonavir [see Drug Interactions (7.2) ] • Concomitant use of erythromycin [see… (Fachinformation zu Dronedaron, Gegenanzeigen)

These conditions include patients with hypokalemia or hypomagnesemia, with congenital long QT syndrome, patients taking antiarrhythmic medicines or other medicinal products with known risk for QT prolongation/ Torsades de Pointes, and cumulative high-dose anthracycline therapy. (Fachinformation zu Lapatinib, Warnhinweise und Vorsichtsmaßnahmen)

Strong CYP3A4 Inhibitors: Avoid coadministration of strong CYP3A4 inhibitors with VITRAKVI. (Fachinformation zu Larotrectinib, Arzneimittelwechselwirkungen)

Strong or moderate CYP3A inhibitors: Avoid concomitant use. (Fachinformation zu Lemborexant, Arzneimittelwechselwirkungen)

Avoid use in patients with known prolongation, those with hypokalemia, and with other drugs that prolong the QT interval ( 5.11 , 8.5 ) (Fachinformation zu Levofloxacin, Warnhinweise und Vorsichtsmaßnahmen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Concomitant administration of JUXTAPID with moderate or strong CYP3A4 inhibitors, as this can increase JUXTAPID exposure [see Warnings and Precautions (5.6) , Drug Interactions (7.1) , and Clinical Pharmacology (12.3) ]. (Fachinformation zu Lomitapid, Gegenanzeigen)

…• Bradycardia <50 bpm • Concomitant use of strong CYP3A inhibitors, such as ketoconazole, itraconazole, voriconazole, cyclosporine, telithromycin, clarithromycin, nefazodone, and ritonavir [see Drug Interactions (7.2) ] • Concomitant use of erythromycin [see Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Strong CYP3A4 inhibitors (ketoconazole, ritonavir) increase exposure to macitentan: avoid co-administration with OPSUMIT ( 7.2 , 12.3 ) . (Fachinformation zu Macitentan, Arzneimittelwechselwirkungen)

SELZENTRY is contraindicated in patients with severe renal impairment or ESRD (creatinine clearance [CrCl] less than 30 mL per minute) who are concomitantly taking potent CYP3A inhibitors or inducers [see Warnings and Precautions ( 5.3 )]. (Fachinformation zu Maraviroc, Gegenanzeigen)

Although there have been no reports of such interactions with methylergonovine alone, strong and moderate CYP 3A4 inhibitors should not be co-administered with methylergonovine. (Fachinformation zu Methylergometrin, Arzneimittelwechselwirkungen)

Considering the known proarrhythmic properties of mexiletine and the lack of evidence of improved survival for any antiarrhythmic drug in patients without life-threatening arrhythmias, the use of mexiletine as well as other antiarrhythmic agents should be reserved for patients with life-threatening ventricular arrhythmia. (Fachinformation zu Mexiletin, Boxed Warning (umrahmter Warnhinweis))

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Therefore, moxifloxacin should be avoided with Class IA and Class III antiarrhythmics [see Warnings and Precautions ( 5.6 ), Nonclinical Toxicology ( 13.2 ), and Patient Counseling Information ( 17 )]. (Fachinformation zu Moxifloxacin, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Patients concomitantly using strong CYP3A4 inhibitors (e.g., clarithromycin, ketoconazole) because these medications can significantly increase exposure to naloxegol which may precipitate opioid withdrawal symptoms such as hyperhidrosis, chills, diarrhea, abdominal pain, anxiety, irritability, and yawning [see Drug Interactions (7.1) and Clinical Pharmacology… (Fachinformation zu Naloxegol, Gegenanzeigen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Avoid use of concomitant drugs known to prolong the QT interval and strong CYP3A4 inhibitors [see Drug Interactions ( 7.1 , 7.2 )] . (Fachinformation zu Nilotinib, Boxed Warning (umrahmter Warnhinweis))

Therefore, the concomitant administration of NYMALIZE and strong CYP3A4 inhibitors should generally be avoided [ see Warnings and Precautions (5.3) ]. (Fachinformation zu Nimodipin, Arzneimittelwechselwirkungen)

…• Bradycardia <50 bpm • Concomitant use of strong CYP3A inhibitors, such as ketoconazole, itraconazole, voriconazole, cyclosporine, telithromycin, clarithromycin, nefazodone, and ritonavir [see Drug Interactions (7.2) ] • Concomitant use of erythromycin [see Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

CYP3A4 inhibitors and inducers : SULAR is substrate of CYP3A4 and coadministration of SULAR with any known inducer or inhibitor of CYP3A4 should be avoided in general. (Fachinformation zu Nisoldipin, Arzneimittelwechselwirkungen)

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Avoid coadministration of oxaliplatin injection with medicinal products with a known potential to prolong the QT interval. (Fachinformation zu Oxaliplatin, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Cytochrome P450 3A4 Interaction The concomitant use of Oxycodone Hydrochloride Oral Solution with all cytochrome P450 3A4 inhibitors may result in an increase in oxycodone plasma concentrations, which could increase or prolong adverse reactions and may cause potentially fatal respiratory depression. (Fachinformation zu Oxycodon, Boxed Warning (umrahmter Warnhinweis))

Cytochrome P450 3A4 Interaction The concomitant use of oxycodone hydrochloride tablets with all cytochrome P450 3A4 inhibitors may result in an increase in oxycodone plasma concentrations, which could increase or prolong adverse reactions and may cause potentially fatal respiratory depression. (Fachinformation zu Oxycodon und Paracetamol, Boxed Warning (umrahmter Warnhinweis))

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. (Fachinformation zu Paracetamol und Codein, Boxed Warning (umrahmter Warnhinweis))

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Strong CYP3A4 Inhibitors : Avoid coadministration of VOTRIENT with strong CYP3A4 inhibitors. (Fachinformation zu Pazopanib, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Cytochrome P450 3A4 Interaction The concomitant use of DEMEROL Injection with all cytochrome P450 3A4 inhibitors may result in an increase in meperidine plasma concentrations, which could increase or prolong adverse reactions and may cause potentially fatal respiratory depression. (Fachinformation zu Pethidin, Boxed Warning (umrahmter Warnhinweis))

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Rifampin and Other CYP3A Inducers Avoid rifampin or other CYP3A inducers such as phenobarbital, carbamazepine, phenytoin, and St. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Rifampin and Other CYP3A Inducers Avoid rifampin or other CYP3A inducers such as phenobarbital, carbamazepine, phenytoin, and St. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

The use of WAKIX should be avoided in patients with known QT prolongation or in combination with other drugs known to prolong the QT interval [see Drug Interactions ( 7.1 )]. (Fachinformation zu Pitolisant, Warnhinweise und Vorsichtsmaßnahmen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Considering the known proarrhythmic properties of procainamide and the lack of evidence of improved survival for any antiarrhythmic drug in patients without life-threatening arrhythmias, the use of procainamide as well as other antiarrhythmic agents should be reserved for patients with life-threatening ventricular arrhythmias. (Fachinformation zu Procainamid, Boxed Warning (umrahmter Warnhinweis))

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex, requiring careful consideration of the effects on the parent drug, codeine, and the active metabolite, morphine. (Fachinformation zu Promethazin und Codein, Boxed Warning (umrahmter Warnhinweis))

• The applicability of the CAST results to other populations (e.g., those without recent myocardial infarction) or other antiarrhythmic drugs is uncertain, but at present, it is prudent to consider any IC antiarrhythmic to have a significant proarrhythmic risk in patients with structural heart disease. (Fachinformation zu Propafenon, Boxed Warning (umrahmter Warnhinweis))

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Strong CYP3A4 Inhibitors: Avoid concomitant administration. (Fachinformation zu Rimegepant, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…• Bradycardia <50 bpm • Concomitant use of strong CYP3A inhibitors, such as ketoconazole, itraconazole, voriconazole, cyclosporine, telithromycin, clarithromycin, nefazodone, and ritonavir [see Drug Interactions (7.2) ] • Concomitant use of erythromycin [see Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

Use with P-gp and Strong CYP3A Inhibitors or Inducers Avoid concomitant use of XARELTO with known combined P-gp and strong CYP3A inhibitors [see Drug Interactions (7.2) ] . (Fachinformation zu Rivaroxaban, Warnhinweise und Vorsichtsmaßnahmen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Strong cytochrome P450 3A4 inhibitors (e.g., ritonavir, ketoconazole): Use not recommended. (Fachinformation zu Salmeterol, Arzneimittelwechselwirkungen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Severe renal impairment (CCr < 30 mL/min) Severe hepatic impairment (Child-Pugh score ≥ 10) Concomitant administration with strong Cytochrome P450 3A4 (CYP3A4) inhibitors (e.g., ketoconazole, clarithromycin, itraconazole, ritonavir) [see DRUG INTERACTIONS (7.1) ] Patients with a history of hypersensitivity to silodosin or any of the ingredients in silodosin capsules… (Fachinformation zu Silodosin, Gegenanzeigen)

• Statins: Avoid simvastatin doses greater than 10 mg daily. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Interaction with Strong Inhibitors and Inducers of CYP3A4 and/or P-gp Avoid concomitant use of sirolimus with strong inhibitors of CYP3A4 and/or P-gp (such as ketoconazole, voriconazole, itraconazole, erythromycin, telithromycin, or clarithromycin) or strong inducers of CYP3A4 and/or P-gp (such as rifampin or rifabutin) [ see Drug Interactions (7.2) ]. (Fachinformation zu Sirolimus, Warnhinweise und Vorsichtsmaßnahmen)

The dosage of Solifenacin succinate tablets greater than 5 mg once daily is not recommended when concomitantly used with strong CYP3A4 inhibitors [see Dosage and Administration ( 2.4 )] . (Fachinformation zu Solifenacin, Arzneimittelwechselwirkungen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Effect of Other Drugs on TALZENNA Effect of P-gp Inhibitors Breast Cancer Avoid coadministration of TALZENNA with the following P-gp inhibitors: itraconazole, amiodarone, carvedilol, clarithromycin, itraconazole, and verapamil. (Fachinformation zu Talazoparib, Arzneimittelwechselwirkungen)

• Should not be used in combination with strong inhibitors of CYP3A4. (Fachinformation zu Tamsulosin, Warnhinweise und Vorsichtsmaßnahmen)

Certain conditions may increase the risk for torsade de pointes or sudden death such as (1) bradycardia; (2) hypokalemia or hypomagnesemia; (3) concomitant use of other drugs that prolong the QTc interval; and (4) presence of congenital prolongation of the QT interval [see Warnings and Precautions ( 5.8 ), Clinical Pharmacology (12.2) ]. (Fachinformation zu Tetrabenazin, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Avoid co-administration of strong CYP3A4 inhibitors (e.g., itraconazole, clarithromycin, ritonavir) and strong CYP3A4 inducers (e.g., rifampin, phenytoin) with TEPADINA due to the potential effects on efficacy and toxicity [see Clinical Pharmacology ( 12.3 ) ] . (Fachinformation zu Thiotepa, Arzneimittelwechselwirkungen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…dominant polycystic kidney disease (ADPKD) outside of FDA-approved REMS [see Warnings and Precautions (5.2) ] Unable to sense or respond to thirst Hypovolemic hyponatremia Taking strong CYP3A inhibitors [see Warnings and Precautions (5.5) ] Anuria Hypersensitivity (e.g., anaphylactic shock, rash generalized) to tolvaptan or any components of the product [see Adverse… (Fachinformation zu Tolvaptan, Gegenanzeigen)

• CYP3A inducers: Avoid concomitant use. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Avoid concomitant use HYCAMTIN capsules with P-gp inhibitors or BCRP inhibitors. (Fachinformation zu Topotecan, Arzneimittelwechselwirkungen)

Drugs known to prolong the QT interval and strong CYP3A4 inhibitors should be avoided [see Warnings and Precautions (5.1) ] . (Fachinformation zu Toremifen, Boxed Warning (umrahmter Warnhinweis))

CYP3A inhibitors: Avoid concomitant strong CYP3A inhibitors ( 7.1 ) (Fachinformation zu Trabectedin, Arzneimittelwechselwirkungen)

The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with tramadol are complex. (Fachinformation zu Tramadol, Boxed Warning (umrahmter Warnhinweis))

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with tramadol are complex. (Fachinformation zu Tramadol und Paracetamol, Boxed Warning (umrahmter Warnhinweis))

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

• Strong CYP3A Inhibitors and Inducers: Avoid coadministration with strong CYP3A inhibitors and inducers. (Fachinformation zu Tretinoin, Arzneimittelwechselwirkungen)

Strong CYP 3A Inhibitors Triazolam is contraindicated in patients receiving strong inhibitors of CYP 3A such as ketoconazole, itraconazole, nefazodone, ritonavir, indinavir, nelfinavir, saquinavir, and lopinavir [see Contraindications (4) , Drug Interactions (7.1) ] . (Fachinformation zu Triazolam, Warnhinweise und Vorsichtsmaßnahmen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval… (Fachinformation zu Dronedaron, Gegenanzeigen)

UBRELVY is contraindicated: With concomitant use of strong CYP3A4 inhibitors [see Drug Interactions ( 7.1 )] In patients with a history of serious hypersensitivity to ubrogepant or any component of UBRELVY. (Fachinformation zu Ubrogepant, Gegenanzeigen)

For patients with atopic dermatitis, coadministration of RINVOQ 30 mg once daily with strong CYP3A4 inhibitors is not recommended. (Fachinformation zu Upadacitinib, Arzneimittelwechselwirkungen)

QT Prolongation : Patients with congenital QT syndrome or taking class IA or III antiarrhythmics should avoid using vardenafil hydrochloride tablets. (Fachinformation zu Vardenafil, Warnhinweise und Vorsichtsmaßnahmen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Avoid concomitant use of VEPPANU with strong CYP3A inhibitors or drugs known to prolong the QTc interval. (Fachinformation zu Vepdegestrant, Warnhinweise und Vorsichtsmaßnahmen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

Therefore, the concomitant use of strong CYP3A inhibitors with vincristine sulfate should be avoided. (Fachinformation zu Vincristin, Arzneimittelwechselwirkungen)

…sinus syndrome (except when used in conjunction with a functioning pacemaker) • Bradycardia <50 bpm • Concomitant use of strong CYP3A inhibitors, such as ketoconazole, itraconazole, voriconazole, cyclosporine, telithromycin, clarithromycin, nefazodone, and ritonavir [see Drug Interactions (7.2) ] • Concomitant use of erythromycin [see Clinical Pharmacology (12.3)… (Fachinformation zu Dronedaron, Gegenanzeigen)

…(12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone • QTc interval >500 ms or… (Fachinformation zu Dronedaron, Gegenanzeigen)

…Clinical Pharmacology (12.3) ] • Concomitant use of drugs or herbal products that prolong the QT interval and might increase the risk of torsade de pointes, such as phenothiazine antipsychotics, tricyclic antidepressants, certain oral macrolide antibiotics, and Class I and III antiarrhythmics • Liver or lung toxicity related to the previous use of amiodarone… (Fachinformation zu Dronedaron, Gegenanzeigen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

P-glycoprotein (P-gp) Inhibitors : Co-administration of P-gp inhibitors can increase afatinib exposure. (Fachinformation zu Afatinib, Arzneimittelwechselwirkungen)

CYP3A4 inhibitors: Use with caution in combination due to increased exposure of alosetron. (Fachinformation zu Alosetron, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

MAO inhibitors, tricyclic antidepressants and drugs that prolong the QTc interval may potentiate effect on the cardiovascular system. (Fachinformation zu Arformoterol, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

CYP3A4/5 Inhibitors Co-administration of ketoconazole, a strong inhibitor of CYP3A4/5, increased the plasma exposure of axitinib in healthy volunteers. (Fachinformation zu Axitinib, Arzneimittelwechselwirkungen)

Use of Cytochrome P450 3A4 Inhibitors Ritonavir and other strong cytochrome P450 3A4 (CYP3A4) inhibitors can significantly increase plasma fluticasone propionate exposure, resulting in significantly reduced serum cortisol concentrations [see Drug Interactions ( 7.2 ) and Clinical Pharmacology ( 12.3 )] . (Fachinformation zu Azelastin und Fluticason, Warnhinweise und Vorsichtsmaßnahmen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT interval QT prolongation has been reported with metronidazole, a component of bismuth subcitrate potassium, metronidazole and tetracycline hydrochloride, particularly when administered with drugs with the potential for prolonging the QT interval. (Fachinformation zu Bismutsubcitrat, Metronidazol und Tetracyclin, Warnhinweise und Vorsichtsmaßnahmen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Strong CYP3A4 Inhibitors: Closely monitor patients with concomitant use. (Fachinformation zu Bortezomib, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Interactions with Strong Cytochrome P450 3A4 Inhibitors Caution should be exercised when considering the co-administration of PULMICORT FLEXHALER with ketoconazole, and other known strong CYP3A4 inhibitors (e.g., ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nefazodone, nelfinavir, saquinavir, telithromycin) because adverse effects related to… (Fachinformation zu Budesonid, Warnhinweise und Vorsichtsmaßnahmen)

Strong cytochrome P450 3A4 inhibitors (e.g., ritonavir): Risk of increased systemic corticosteroid effects. (Fachinformation zu Budesonid und Formoterol, Warnhinweise und Vorsichtsmaßnahmen)

The risk of combining buprenorphine with other QT-prolonging agents is not known. (Fachinformation zu Buprenorphin und Naloxon, Warnhinweise und Vorsichtsmaßnahmen)

Other inhibitors and inducers of CYP3A4: Substances that inhibit CYP3A4, such as ketoconazole or ritonavir, may inhibit buspirone metabolism and increase plasma concentrations of buspirone while substances that induce CYP3A4, such as dexamethasone or certain anticonvulsants (phenytoin, phenobarbital, carbamazepine), may increase the rate of buspirone metabolism. (Fachinformation zu Buspiron, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Quinine sulfate is not recommended for use with other drugs known to cause QT prolongation, including Class IA antiarrhythmic agents (e.g., quinidine, procainamide, disopyramide), and Class III antiarrhythmic agents (e.g., amiodarone, sotalol, dofetilide). (Fachinformation zu Chinin, Warnhinweise und Vorsichtsmaßnahmen)

In a drug interaction study, co-administration of orally inhaled ciclesonide and oral ketoconazole, a potent inhibitor of cytochrome P450 3A4, increased the exposure (AUC) of des-ciclesonide by approximately 3.6-fold at steady state, while levels of ciclesonide remained unchanged. (Fachinformation zu Ciclesonid, Arzneimittelwechselwirkungen)

Inhibitors of CYP3A4 or CYP2C19 Inhibitors of CYP3A4 Coadministration of strong (e.g., ketoconazole) and moderate (e.g., erythromycin, diltiazem and grapefruit juice) CYP3A4 inhibitors can increase exposure to cilostazol. (Fachinformation zu Cilostazol, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

QT Interval Prolongation and V entricular A rr h ythmia Decreases in serum calcium can also prolong the QT interval, potentially resulting in ventricular arrhythmia. (Fachinformation zu Cinacalcet, Warnhinweise und Vorsichtsmaßnahmen)

Inhibitors of CYP3A4 and CYP3A5 Inhibitors of CYP3A4 and/or CYP3A5 may increase plasma concentrations of clindamycin [ see Clinical Pharmacology (12.3) ]. (Fachinformation zu Clindamycin, Arzneimittelwechselwirkungen)

CYP3A4 Inhibitors The systemic exposure of darifenacin from darifenacin extended-release tablets is increased in the presence of CYP3A4 inhibitors. (Fachinformation zu Darifenacin, Arzneimittelwechselwirkungen)

Moderate or strong CYP3A4 inhibitors: Give one third of the recommended dosage of EMFLAZA ( 7.1 ) (Fachinformation zu Deflazacort, Arzneimittelwechselwirkungen)

Carefully monitor cardiac rhythm when administering SUPRANE to susceptible patients (e.g., patients with congenital Long QT Syndrome or patients taking drugs that can prolong the QT interval). (Fachinformation zu Desfluran, Warnhinweise und Vorsichtsmaßnahmen)

CYP3A4 inhibitors such as itraconazole, voriconazole, fluconazole, grapefruit juice, or ketoconazole may increase plasma hormone concentrations. (Fachinformation zu Desogestrel und Ethinylestradiol, Arzneimittelwechselwirkungen)

CYP2C19 or CYP3A4 Inhibitors Clinical Impact: Increased exposure of dexlansoprazole is expected when used concomitantly with strong inhibitors [see Clinical Pharmacology (12.3) ] . (Fachinformation zu Dexlansoprazol, Arzneimittelwechselwirkungen)

Other Drugs with Anticholinergic Activity The following agents may increase certain actions or side effects of anticholinergic drugs including dicyclomine hydrochloride: amantadine, antiarrhythmic agents of Class I (e.g., quinidine), antihistamines, antipsychotic agents (e.g., phenothiazines), benzodiazepines, MAO inhibitors, narcotic analgesics (e.g., meperidine),… (Fachinformation zu Dicycloverin, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Co-administration of PIFELTRO and drugs that are inhibitors of CYP3A may result in increased plasma concentrations of doravirine. (Fachinformation zu Doravirin, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Strong cytochrome P450 (CYP) 3A inhibitors may increase exposure to doxazosin and increased risk of hypotension. (Fachinformation zu Doxazosin, Arzneimittelwechselwirkungen)

Monitor for increased dronabinol-related adverse reactions when dronabinol oral solution is co-administered with inhibitors of CYP2C9 (e.g., amiodarone, fluconazole) and inhibitors of CYP3A4 enzymes (e.g., ketoconazole, itraconazole, clarithromycin, ritonavir, erythromycin, grapefruit juice). (Fachinformation zu Dronabinol, Arzneimittelwechselwirkungen)

…development of prolonged QT syndrome, such as: 1) clinically significant bradycardia (less than 50 bpm), 2) any clinically significant cardiac disease, 3) treatment with Class I and Class III antiarrhythmics, 4) treatment with monoamine oxidase inhibitors (MAOI's), 5) concomitant treatment with other drug products known to prolong the QT interval (see PRECAUTIONS,… (Fachinformation zu Droperidol, Warnhinweise)

Consider monitoring serum potassium concentration in high-risk patients who take a strong CYP3A4 inhibitor long-term and concomitantly. (Fachinformation zu Drospirenon und Ethinylestradiol, Warnhinweise und Vorsichtsmaßnahmen)

P-gp Inhibitors Treatment of NVAF Based on clinical experience from the ENGAGE AF-TIMI 48 study, dose reduction in patients concomitantly receiving P-gp inhibitors resulted in edoxaban blood levels that were lower than in patients who were given the full dose. (Fachinformation zu Edoxaban, Arzneimittelwechselwirkungen)

Concomitant Use with CYP3A Inhibitors Exposure to elexacaftor, tezacaftor and ivacaftor are increased when used concomitantly with strong or moderate CYP3A inhibitors. (Fachinformation zu Elexacaftor, Tezacaftor und Ivacaftor, Warnhinweise und Vorsichtsmaßnahmen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Coadministration of DESCOVY with other drugs that inhibit P-gp and BCRP may increase the absorption and plasma concentration of TAF. (Fachinformation zu Emtricitabin und Tenofovir, Arzneimittelwechselwirkungen)

QT Prolongation: Monitor for prolonged QT intervals in patients with congestive heart failure, bradyarrhythmias, drugs known to prolong the QT interval, and electrolyte abnormalities. (Fachinformation zu Eribulin, Warnhinweise und Vorsichtsmaßnahmen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Inhibitors of CYP3A4 such as erythromycin, clarithromycin, ketoconazole, itraconazole, ritonavir and grapefruit juice may increase plasma concentrations of estrogens and may result in side effects. (Fachinformation zu Estradiol, Arzneimittelwechselwirkungen)

…exposure at steady state. [See Clinical Pharmacology (12.3).] Substances Increasing the Systemic Exposure of COCs (enzyme inhibitors): Concomitant administration of moderate or strong CYP3A4 inhibitors like azole antifungals (for example, ketoconazole, itraconazole, voriconazole, fluconazole), verapamil, macrolides (for example, clarithromycin, erythromycin), diltiazem,… (Fachinformation zu Estradiol und Dienogest, Arzneimittelwechselwirkungen)

Inducers and/or inhibitors of CYP3A4 may affect estrogen drug metabolism and decrease or increase the estrogen plasma concentration. (Fachinformation zu Estradiol und Norethisteron, Arzneimittelwechselwirkungen)

The dose of LUNESTA should be reduced in patients who are administered potent inhibitors of CYP3A4, such as ketoconazole, while taking LUNESTA. (Fachinformation zu Eszopiclon, Warnhinweise und Vorsichtsmaßnahmen)

Concomitant administration of strong or moderate CYP3A4 inhibitors such as itraconazole, voriconazole, fluconazole, grapefruit juice, or ketoconazole may increase plasma estrogen and/or progestin concentrations. (Fachinformation zu Etonogestrel und Ethinylestradiol, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Antidepressants, QTc Prolonging Drugs Formoterol, as with other beta 2 -agonists, should be administered with extreme caution to patients being treated with monoamine oxidase inhibitors, tricyclic antidepressants, or drugs known to prolong the QTc interval because the effect of adrenergic agonists on the cardiovascular system may be potentiated by these agents. (Fachinformation zu Formoterol, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A4 Inhibitor: Monitor adverse reactions if concomitant use with IRESSA. (Fachinformation zu Gefitinib, Arzneimittelwechselwirkungen)

Other Anticholinergic Drugs There is potential for an additive interaction between glycopyrrolate and concomitantly used anticholinergic drugs (e.g., tricyclic antidepressants, anti-epileptics, class I antiarrhythmics, anti­-spasmodics, amantadine) resulting in increased anticholinergic adverse reactions. (Fachinformation zu Glycopyrroniumbromid, Arzneimittelwechselwirkungen)

Effect on QT/QTc Interval: Androgen deprivation therapy may prolong the QT interval. (Fachinformation zu Goserelin, Warnhinweise und Vorsichtsmaßnahmen)

…Interactions: Effect of other Drugs on INTUNIV Concomitant Drug Name or Drug Class Clinical Rationale and Magnitude of Drug Interaction Clinical Recommendation Strong and moderate CYP3A4 inhibitors, e.g., ketoconazole, fluconazole Guanfacine is primarily metabolized by CYP3A4 and its plasma concentrations can be significantly affected resulting in an increase… (Fachinformation zu Guanfacin, Arzneimittelwechselwirkungen)

Concomitant administration of inhibitors of CYP3A4 may lead to increases in serum concentrations of ALKINDI SPRINKLE and increase the risk of adverse reactions associated with the use of excessive doses. (Fachinformation zu Hydrocortison, Arzneimittelwechselwirkungen)

• CYP3A4 Inhibitors: Use in combination with CYP3A4 inhibitors could decrease the effectiveness of ifosfamide. (Fachinformation zu Ifosfamid, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Monitor QT interval when administering FORANE to susceptible patients (e.g., patients with congenital Long QT Syndrome or patients taking drugs that can prolong the QT interval). (Fachinformation zu Isofluran, Warnhinweise und Vorsichtsmaßnahmen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Concomitant administration of itraconazole, a strong CYP3A4 inhibitor, with DUAVEE, resulted in increases in bazedoxifene exposure (40%) and, to a lesser extent, conjugated estrogens exposure (9% for baseline-adjusted total estrone, 5% for total equilin), compared to DUAVEE alone [see Pharmacokinetics (12.3) ] . (Fachinformation zu Konjugierte Estrogene und Bazedoxifen, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Strong CYP3A4 or CYP2C9 Inhibitors Patients with renal or hepatic impairment who are taking strong inhibitors of CYP3A4 and CYP2C9 may have a significant increase in exposure to VIMPAT. (Fachinformation zu Lacosamid, Arzneimittelwechselwirkungen)

CYP2C19 or CYP3A4 Inhibitors Clinical Impact: Increased exposure of lansoprazole is expected when used concomitantly with strong inhibitors [see Clinical Pharmacology (12.3) ] . (Fachinformation zu Lansoprazol, Arzneimittelwechselwirkungen)

Antiarrhythmics: amiodarone Effect on amiodarone, ledipasvir, and sofosbuvir concentrations unknown Coadministration of amiodarone with ledipasvir and sofosbuvir may result in serious symptomatic bradycardia. (Fachinformation zu Ledipasvir und Sofosbuvir, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Effect on QT/QTc Interval: Androgen deprivation therapy may prolong the QT interval. (Fachinformation zu Leuprorelin, Warnhinweise und Vorsichtsmaßnahmen)

CYP3A inhibitors such as itraconazole, voriconazole, fluconazole, grapefruit juice The effect of grapefruit juice on CYP3A4 enzymes (e.g., strong vs. moderate inhibition) depends on its brand, concentration, and preparation. , or ketoconazole may increase systemic exposure of the estrogen and/or progestin component of CHCs. (Fachinformation zu Levonorgestrel und Ethinylestradiol, Arzneimittelwechselwirkungen)

Risk of QT Prolongation : Lofexidine tablets prolong the QT interval. (Fachinformation zu Lofexidin, Warnhinweise und Vorsichtsmaßnahmen)

…combination with others drugs or herbal products that are known to prolong the QT interval, including Class 1A (e.g., quinidine, procainamide) or Class III (e.g., amiodarone, sotalol) antiarrhythmics, antipsychotics (e.g., chlorpromazine, haloperidol, thioridazine, ziprasidone), antibiotics (e.g., moxifloxacin), or any other drug known to prolong the QT interval… (Fachinformation zu Loperamid, Warnhinweise)

Ketoconazole (Potent Inhibitor of CYP3A4) Coadministration of a single 500 mg oral dose of mefloquine with 400 mg of ketoconazole once daily for 10 days in 8 healthy volunteers resulted in an increase in the mean C max and AUC of mefloquine by 64% and 79%, respectively, and an increase in the mean elimination half-life of mefloquine from 322 hours to 448 hours. (Fachinformation zu Mefloquin, Arzneimittelwechselwirkungen)

Examples: Drugs known to have potential to prolong QT interval: Class I and III antiarrhythmics, some neuroleptics and tricyclic antidepressants, and calcium channel blockers. (Fachinformation zu Methadon, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval QT prolongation has been reported, particularly when metronidazole was administered with drugs with the potential for prolonging the QT interval. (Fachinformation zu Metronidazol, Arzneimittelwechselwirkungen)

Cytochrome P450-3A4 Inhibitors: May result in prolonged sedation due to decreased plasma clearance of midazolam. (Fachinformation zu Midazolam, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Strong cytochrome P450 3A4 inhibitors (e.g., ritonavir): Risk of increased systemic corticosteroid effects. (Fachinformation zu Mometason, Warnhinweise und Vorsichtsmaßnahmen)

P-Glycoprotein (P-gp) Inhibitors Clinical Impact: The concomitant use of P-gp inhibitors can increase the exposure to morphine by two-fold and can increase the risk of hypotension, respiratory depression, profound sedation, coma, and death. (Fachinformation zu Morphin, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Moderate (e.g., fluconazole, atazanavir, aprepitant, diltiazem, erythromycin) and Strong (e.g., itraconazole, ketoconazole, clarithromycin, ritonavir, saquinavir) CYP3A Inhibitors Clinical Impact Increase in plasma naldemedine concentrations [see Clinical Pharmacology (12.3) ] Intervention Monitor for potential naldemedine-related adverse reactions [see Adverse… (Fachinformation zu Naldemedin, Arzneimittelwechselwirkungen)

CYP2C19 or CYP3A4 Inhibitors Clinical Impact : Increased exposure of esomeprazole [see Clinical Pharmacology (12.3) ]. (Fachinformation zu Naproxen und Esomeprazol, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Coadministration of P-gp and CYP3A4 inhibitors may increase nintedanib exposure. (Fachinformation zu Nintedanib, Arzneimittelwechselwirkungen)

CYP3A4 inhibitors such as itraconazole, voriconazole, fluconazole, grapefruit juice, or ketoconazole may increase plasma hormone concentrations. (Fachinformation zu Norelgestromin und Ethinylestradiol, Arzneimittelwechselwirkungen)

Substances increasing the systemic concentrations of HCs: Co-administration of certain HCs and strong or moderate CYP3A4 inhibitors such as itraconazole, voriconazole, fluconazole, grapefruit juice, or ketoconazole may increase the systemic concentrations of progestins, including norethindrone. (Fachinformation zu Norethisteron, Arzneimittelwechselwirkungen)

CYP3A4 inhibitors such as itraconazole or ketoconazole may increase plasma hormone levels. (Fachinformation zu Norethisteron und Ethinylestradiol, Arzneimittelwechselwirkungen)

CYP3A4 inhibitors such as itraconazole, voriconazole, fluconazole, grapefruit juice, or ketoconazole may increase plasma hormone concentrations. (Fachinformation zu Norgestimat und Ethinylestradiol, Arzneimittelwechselwirkungen)

Concomitant administration of CYP3A4 inhibitors such as itraconazole, fluconazole, grapefruit juice or ketoconazole may increase plasma hormone concentrations. (Fachinformation zu Norgestrel und Ethinylestradiol, Arzneimittelwechselwirkungen)

Ofloxacin should be avoided in patients with known prolongation of the QT interval, patients with uncorrected hypokalemia, and patients receiving Class IA (quinidine, procainamide), or Class III (amiodarone, sotalol) antiarrhythmic agents. (Fachinformation zu Ofloxacin, Vorsichtsmaßnahmen)

Risk of Use in Patients with Decreased Cytochrome P450 2D6 Function or Concomitant Use or Discontinuation with Cytochrome P450 3A4 Inhibitors and Inducers Risk of Increased Oliceridine Plasma Concentrations Increased plasma concentrations of oliceridine, which may result in prolonged opioid adverse reactions and exacerbated respiratory depression, may occur when… (Fachinformation zu Oliceridin, Warnhinweise und Vorsichtsmaßnahmen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Concomitant administration of CYP3A4 inhibitors may inhibit the metabolism of, and increase the mometasone furoate plasma concentration and potentially increase the risk for adverse reactions. (Fachinformation zu Olopatadin und Mometason, Arzneimittelwechselwirkungen)

CYP2C19 or CYP3A4 Inhibitors Clinical Impact: Increased exposure of omeprazole [see Clinical Pharmacology ( 12.3 )] . (Fachinformation zu Omeprazol, Arzneimittelwechselwirkungen)

CYP2C19 or CYP3A4 Inhibitors Clinical Impact: Increased exposure of omeprazole [see Clinical Pharmacology ( 12.3 )] . (Fachinformation zu Omeprazol und Natriumhydrogencarbonat, Arzneimittelwechselwirkungen)

Co-administration with strong cytochrome P450 (CYP) 3A4 inhibitors (e.g., ketoconazole) increases the systemic exposure of oxybutynin. (Fachinformation zu Oxybutynin, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Exposure of Paricalcitol Injection will increase upon coadministration with strong CYP3A inhibitors [see Clinical Pharmacology (12.3) ] . (Fachinformation zu Paricalcitol, Arzneimittelwechselwirkungen)

Drugs that Prolong QT: Use with caution in patients who are at significant risk of developing QTc prolongation. (Fachinformation zu Pasireotid, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Anti-Arrhythmic Drugs, QT Prolonging Drugs, Drugs that may Decrease Heart Rate PONVORY has not been studied in patients taking QT prolonging drugs. (Fachinformation zu Ponesimod, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

CYP 3A4 inhibitors (e.g., ketoconazole, macrolide antibiotics): Ketoconazole has been reported to decrease the metabolism of certain corticosteroids by up to 60% leading to an increased risk of corticosteroid side effects. (Fachinformation zu Prednisolon, Arzneimittelwechselwirkungen)

CYP 3A4 Inhibitors (e.g., Ketoconazole, Macrolide Antibiotics) Ketoconazole has been reported to decrease the metabolism of certain corticosteroids by up to 60% leading to increased risk of corticosteroid side effects. (Fachinformation zu Prednison, Arzneimittelwechselwirkungen)

QT Interval Prolonging Drugs The pharmacodynamic interaction potential to prolong the QT interval of the electrocardiogram between Primaquine phosphate Tablets and other drugs that effect cardiac conduction is unknown. (Fachinformation zu Primaquin, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Ketoconazole (strong CYP3A4 inhibitor): Increases AUC for ramelteon; administer with caution. (Fachinformation zu Ramelteon, Arzneimittelwechselwirkungen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

CYP2C8 and CYP3A4 Inhibitors Intervention: Repaglinide tablets dose reductions and increased frequency of glucose monitoring may be required when co‑administered. (Fachinformation zu Repaglinid, Arzneimittelwechselwirkungen)

• Concomitant P-glycoprotein (P-gp) inhibitors (e.g., cyclosporine): Caution should be exercised when concomitant use of XIFAXAN and a P-glycoprotein inhibitor is needed. (Fachinformation zu Rifaximin, Warnhinweise und Vorsichtsmaßnahmen)

In healthy subjects, 75 mg once daily and 300 mg once daily (3 times and 12 times the dose in EDURANT) have been shown to prolong the QTc interval of the electrocardiogram. (Fachinformation zu Rilpivirin, Warnhinweise und Vorsichtsmaßnahmen)

QT Interval Prolongation The overall analysis of ECG data in pediatric patients indicates that the concomitant use of Rocuronium Bromide Injection with general anesthetic agents can prolong the QTc interval [see Clinical Studies ( 14.3 )]. (Fachinformation zu Rocuronium, Warnhinweise und Vorsichtsmaßnahmen)

Use with inhibitors of CYP3A4 or dual inhibitors of CYP3A4 and CYP1A2 (e.g., erythromycin, ketoconazole, fluvoxamine, enoxacin, cimetidine) will increase roflumilast systemic exposure and may result in increased adverse reactions. (Fachinformation zu Roflumilast, Arzneimittelwechselwirkungen)

• Monitor for toxicities related to increased romidepsin exposure when co-administering romidepsin with strong CYP3A4 inhibitors ( 7.2 ). (Fachinformation zu Romidepsin, Arzneimittelwechselwirkungen)

…anesthetics or agents structurally related to amide- type local anesthetics, since the toxic effects of these drugs are additive. [See Drug Interactions 7.0 ] Patients treated with class III antiarrhythmic drugs (e.g., amiodarone) should be under close surveillance and ECG monitoring considered, since cardiac effects may be additive. [See Drug Interactions 7.0… (Fachinformation zu Ropivacain, Warnhinweise und Vorsichtsmaßnahmen)

Strong CYP3A4 Inhibitors: Reduce, interrupt, or discontinue JAKAFI/JAKAFI XR doses as recommended except in patients with acute or chronic graft-versus-host-disease. (Fachinformation zu Ruxolitinib, Arzneimittelwechselwirkungen)

Strong Inhibitors of CYP3A4/5 Enzymes Ketoconazole significantly increased saxagliptin exposure. (Fachinformation zu Saxagliptin, Arzneimittelwechselwirkungen)

Strong Inhibitors of CYP3A4/5 Enzymes Ketoconazole significantly increased saxagliptin exposure. (Fachinformation zu Saxagliptin und Metformin, Arzneimittelwechselwirkungen)

Caution should be exercised when administering sevoflurane to susceptible patients (e.g., patients with congenital Long QT Syndrome or patients taking drugs that can prolong the QT interval). (Fachinformation zu Sevofluran, Warnhinweise)

CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, erythromycin) increase SILDENAFIL ORAL FILM exposure. (Fachinformation zu Sildenafil, Arzneimittelwechselwirkungen)

Antiarrhythmics: amiodarone Effect on amiodarone, sofosbuvir, velpatasvir, and voxilaprevir concentrations unknown Coadministration of amiodarone with VOSEVI may result in serious symptomatic bradycardia. (Fachinformation zu Sofosbuvir und Velpatasvir, Arzneimittelwechselwirkungen)

Monitor electrolytes and electrocardiograms in patients with congestive heart failure, bradyarrhythmias, drugs known to prolong the QT interval, including Class Ia and III antiarrhythmics. (Fachinformation zu Sorafenib, Warnhinweise und Vorsichtsmaßnahmen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Monitor patients who are at higher risk of developing QT interval prolongation, including patients with a history of QT interval prolongation, patients who are taking antiarrhythmics, or patients with relevant pre-existing cardiac disease, bradycardia, or electrolyte disturbances. (Fachinformation zu Sunitinib, Warnhinweise und Vorsichtsmaßnahmen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

• CYP3A substrates with a narrow therapeutic index (e.g., sirolimus and tacrolimus): Monitor and adjust dosage of concomitant drug as needed when used with MULTAQ. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

…Physicians should be aware that CIALIS for once daily use provides continuous plasma tadalafil levels and should consider this when evaluating the potential for interactions with medications (e.g., nitrates, alpha-blockers, anti-hypertensives and potent inhibitors of CYP3A4) and with substantial consumption of alcohol [see Drug Interactions ( 7.1 , 7.2 , 7.3 )] . (Fachinformation zu Tadalafil, Warnhinweise und Vorsichtsmaßnahmen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Co-administration with Inducers or Inhibitors of CYP3A Metabolism Agents Inducing CYP3A Metabolism: Strong inducers of CYP3A4/5 such as dexamethasone, carbamazepine, phenytoin, phenobarbital, rifampin, rifabutin, and rifampacin may decrease exposure of the active metabolite, sirolimus. (Fachinformation zu Temsirolimus, Warnhinweise und Vorsichtsmaßnahmen)

Effects of Other Drugs on Dronedarone Ketoconazole and Other Potent CYP3A Inhibitors Concomitant use of ketoconazole as well as other potent CYP3A inhibitors such as itraconazole, voriconazole, ritonavir, clarithromycin, and nefazodone is contraindicated because exposure to dronedarone is significantly increased [see Contraindications (4) , Clinical Pharmacology… (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Give a low dose of beta-blockers initially, and increase only after ECG verification of good tolerability [see Drug Interactions (7.3) , Clinical Pharmacology (12.3) ] . (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Simultaneous administration of drugs that inhibit the activity of liver microsomal enzymes, i.e., CYP3A4 inhibitors such as cimetidine and ketoconazole, may prolong the half-life and decrease the plasma clearance of tinidazole, increasing the plasma concentrations of tinidazole. (Fachinformation zu Tinidazol, Arzneimittelwechselwirkungen)

Table 7: Clinically Significant Interactions Affecting XELJANZ/XELJANZ XR When Concomitantly Used with Other Drugs Strong CYP3A4 Inhibitors (e.g., ketoconazole) Clinical Impact Increased exposure to tofacitinib Intervention Dosage modification of XELJANZ/XELJANZ XR is recommended [see Dosage and Administration (2) , Clinical Pharmacology, Figure 3 (12.3) ] Moderate… (Fachinformation zu Tofacitinib, Arzneimittelwechselwirkungen)

Drug Interactions CYP3A4 Inhibitors Ketoconazole, an inhibitor of the drug metabolizing enzyme CYP3A4, significantly increased plasma concentrations of tolterodine when coadministered to subjects who were poor metabolizers (see CLINICAL PHARMACOLOGY, Variability in Metabolism and Drug-Drug Interactions ). (Fachinformation zu Tolterodin, Arzneimittelwechselwirkungen)

Co-administration of other strong CYP3A4 inhibitors (e.g., ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nefazodone, nelfinavir, saquinavir, telithromycin, cobicistat-containing products) with KENALOG-40 Injection may cause increased plasma concentration of triamcinolone leading to adverse reactions. (Fachinformation zu Triamcinolon, Arzneimittelwechselwirkungen)

Effect on QT/QTc Interval: Androgen deprivation therapy may prolong the QT interval. (Fachinformation zu Triptorelin, Warnhinweise und Vorsichtsmaßnahmen)

Increase in Plasma Concentrations of ella Associated with Co-Administered Drugs CYP3A4 inhibitors such as itraconazole or ketoconazole increase plasma concentrations of ella [see Pharmacokinetics (12.3) ] . (Fachinformation zu Ulipristal, Arzneimittelwechselwirkungen)

Drug Interactions with Strong Cytochrome P450 3A4 Inhibitors Caution should be exercised when considering the coadministration of Umeclidinium and Vilanterol ELLIPTA with ketoconazole and other known strong cytochrome P450 3A4 (CYP3A4) inhibitors (including, but not limited to, ritonavir, clarithromycin, conivaptan, indinavir, itraconazole, lopinavir, nefazodone,… (Fachinformation zu Umeclidiniumbromid und Vilanterol, Warnhinweise und Vorsichtsmaßnahmen)

In patients taking a strong CYP2D6 or CYP3A4 inhibitor, or who are CYP2D6 poor metabolizers, INGREZZA and INGREZZA SPRINKLE concentrations may be higher and QT prolongation clinically significant [see Clinical Pharmacology ( 12.2 )] . (Fachinformation zu Valbenazin, Warnhinweise und Vorsichtsmaßnahmen)

• Calcium channel blockers (CCB): Initiate CCB with low dose and increase after ECG verification of tolerability. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

CYP3A4 Substrates Clinical Impact Viloxazine is a weak inhibitor of CYP3A4 which increases the exposure of CYP3A4 substrates when coadministered [see Clinical Pharmacology (12.3) ]. (Fachinformation zu Viloxazin, Arzneimittelwechselwirkungen)

Inhibitors of CYP3A4: May cause earlier onset and/or increased severity of adverse reactions ( 7.1 ) (Fachinformation zu Vinorelbin, Arzneimittelwechselwirkungen)

• Warfarin: Monitor INR after initiating dronedarone in patients taking warfarin. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

As zafirlukast is known to be an inhibitor of CYP3A4 in vitro , it is reasonable to employ appropriate clinical monitoring when these drugs are coadministered with zafirlukast. (Fachinformation zu Zafirlukast, Vorsichtsmaßnahmen)

Drugs That Inhibit CYP3A4 CYP3A4 is a minor metabolic pathway for the elimination of zaleplon because the sum of desethylzaleplon (formed via CYP3A4 in vitro) and its metabolites, 5-oxo-desethylzaleplon and 5-oxo-desethylzaleplon glucuronide, account for only 9% of the urinary recovery of a zaleplon dose. (Fachinformation zu Zaleplon, Arzneimittelwechselwirkungen)

CYP3A4 Inhibitors Ketoconazole Ketoconazole, a potent CYP3A4 inhibitor, increased the exposure to and pharmacodynamic effects of zolpidem. (Fachinformation zu Zolpidem, Arzneimittelwechselwirkungen)

Follow label recommendations for concomitant use of other statins with a CYP3A and P-gp inhibitor like dronedarone. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

More patients experienced clinically significant INR elevations (≥5) usually within 1 week after starting dronedarone versus placebo in patients taking oral anticoagulants in ATHENA. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

More patients experienced clinically significant INR elevations (≥5) usually within 1 week after starting dronedarone versus placebo in patients taking oral anticoagulants in ATHENA. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Dapagliflozin or dapagliflozin 3-O-glucuronide did not meaningfully inhibit P-gp, OCT2, OAT1, or OAT3 active transporters. (Fachinformation zu Dapagliflozin, Arzneimittelwechselwirkungen)

The effect of potent CYP3A4 inhibitors on dutasteride has not been studied. (Fachinformation zu Dutasterid, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

More patients experienced clinically significant INR elevations (≥5) usually within 1 week after starting dronedarone versus placebo in patients taking oral anticoagulants in ATHENA. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

An in vitro study using human liver microsomes suggests that famciclovir is not an inhibitor of CYP3A4 enzymes. (Fachinformation zu Famciclovir, Arzneimittelwechselwirkungen)

More patients experienced clinically significant INR elevations (≥5) usually within 1 week after starting dronedarone versus placebo in patients taking oral anticoagulants in ATHENA. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

More patients experienced clinically significant INR elevations (≥5) usually within 1 week after starting dronedarone versus placebo in patients taking oral anticoagulants in ATHENA. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

These include Class 1A (e.g., quinidine, procainamide) or Class III (e.g., amiodarone, sotalol) antiarrhythmics, certain antipsychotics (e.g., ziprasidone, iloperidone, clozapine, quetiapine, chlorpromazine), certain antidepressants (e.g., citalopram, fluoxetine), certain antibiotics (e.g., azithromycin, erythromycin, clarithromycin, gatifloxacin, moxifloxacin);… (Fachinformation zu Hydroxyzin, Vorsichtsmaßnahmen)

WARNINGS Proarrhythmia: Like other antiarrhythmic agents, CORVERT Injection can induce or worsen ventricular arrhythmias in some patients. (Fachinformation zu Ibutilid, Warnhinweise)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Cardiac Rhythm and Conduction Abnormalities In vitro testing showed that lamotrigine exhibits Class IB antiarrhythmic activity at therapeutically relevant concentrations [see Clinical Pharmacology ( 12.2 )] . (Fachinformation zu Lamotrigin, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Effect of Other Drugs on the Metabolism of Donepezil Inhibitors of CYP3A4 (e.g., ketoconazole) and CYP2D6 (e.g., quinidine), inhibit donepezil metabolism in vitro . (Fachinformation zu Memantin und Donepezil, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Pentoxifylline extended-release tablets have been used concurrently with antihypertensive drugs, beta blockers, digitalis, diuretics, and antiarrhythmics, without observed problems. (Fachinformation zu Pentoxifyllin, Arzneimittelwechselwirkungen)

…chlorpropamide, phenformin, tolazamide, and tolbutamide; (3) tranquilizers and sedatives–chlordiazepoxide, diazepam, and phenobarbital; (4) antigout–allopurinol, colchicine, and probenecid; (5) antiarrhythmics–procainamide, propranolol (see WARNINGS however), and quinidine; and (6) analgesics, antipyretics and anti-inflammatories–propoxyphene, aspirin, indomethacin, and phenylbutazone. (Fachinformation zu Prazosin, Arzneimittelwechselwirkungen)

Aminoglycoside antibiotics, local and some general anesthetics, antiarrhythmic agents, and other drugs that interfere with neuromuscular transmission should be used cautiously, if at all. (Fachinformation zu Pyridostigmin, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Fachinformation zu Ritlecitinib, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Drugs predominantly metabolized by the CYP450 2D6 isozyme include the following drug classes: tricyclic antidepressants, selective serotonin reuptake inhibitors, beta-blockers, antiarrhythmics class 1C (e.g., flecainide and propafenone) and monoamine oxidase inhibitors Type B. (Fachinformation zu Terbinafin, Arzneimittelwechselwirkungen)

Moderate or Weak CYP1A2 Inhibitors Concomitant use of Zanaflex with moderate or weak CYP1A2 inhibitors (e.g., zileuton, antiarrhythmics [amiodarone, mexiletine, propafenone, and verapamil], cimetidine, famotidine, oral contraceptives, acyclovir, and ticlopidine) should be avoided. (Fachinformation zu Tizanidin, Arzneimittelwechselwirkungen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

Hypokalemia and Hypomagnesemia with Potassium-Depleting Diuretics Hypokalemia or hypomagnesemia may occur with concomitant administration of potassium-depleting diuretics. (Fachinformation zu Dronedaron, Warnhinweise und Vorsichtsmaßnahmen)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Fachinformation zu Zileuton, Arzneimittelwechselwirkungen)

Follow label recommendations for concomitant use of other statins with a CYP3A and P-gp inhibitor like dronedarone. (Fachinformation zu Dronedaron, Arzneimittelwechselwirkungen)

Inhibitors of Cytochrome P450 3A4 In controlled clinical studies co-administration of desloratadine with ketoconazole, erythromycin, or azithromycin resulted in increased plasma concentrations of desloratadine and 3 hydroxydesloratadine, but there were no clinically relevant changes in the safety profile of desloratadine. [See Clinical Pharmacology (12.3) .]… (Fachinformation zu Desloratadin, Arzneimittelwechselwirkungen)