Wechselwirkungen von Phenobarbital

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Fachinformation zu Abirateron, Arzneimittelwechselwirkungen)

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

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Abuse and misuse of phenobarbital commonly involve concomitant use of other drugs, alcohol, and/or illicit substances, which is associated with an increased frequency of serious adverse outcomes [see Warnings and Precaution (5.3)]. (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

CYP3A4 Inducers : Avoid coadministration of VIJOICE with a strong CYP3A4 inducer. (Fachinformation zu Alpelisib, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

• Simultaneous use of combined P-gp and strong CYP3A4 inducers reduces blood levels of apixaban: Avoid concomitant use. (Fachinformation zu Apixaban, Arzneimittelwechselwirkungen)

Drug Interactions : Use with strong cytochrome P450 enzyme inducers (e.g., rifampin, phenobarbital, carbamazepine, phenytoin) is not recommended because loss of efficacy may occur ( 5.5 , 7.1 ) (Fachinformation zu Apremilast, Warnhinweise und Vorsichtsmaßnahmen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

…(with or without ritonavir) with carbamazepine is contraindicated due to the risk for loss of virologic response and development of resistance [see Contraindications (4) ]. phenytoin, phenobarbital ↓ atazanavir ↓ phenytoin ↓ phenobarbital Coadministration of REYATAZ (with or without ritonavir) with phenytoin or phenobarbital is contraindicated due to the risk for… (Fachinformation zu Atazanavir, Arzneimittelwechselwirkungen)

• Avoid concurrent use of alcohol or other central nervous system (CNS) depressants with azelastine hydrochloride and fluticasone propionate nasal spray because further decreased alertness and impairment of CNS performance may occur. (Fachinformation zu Azelastin und Fluticason, Warnhinweise und Vorsichtsmaßnahmen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Concomitant administration with oxcarbazepine or phenobarbital is not recommended. (Fachinformation zu Bictegravir, Emtricitabin und Tenofoviralafenamid, Arzneimittelwechselwirkungen)

Strong CYP3A4 Inducers: Avoid concomitant use. (Fachinformation zu Bortezomib, Arzneimittelwechselwirkungen)

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

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Bupropion hydrochloride extended-release tablets (XL) are contraindicated in patients undergoing abrupt discontinuation of alcohol, benzodiazepines, barbiturates, and antiepileptic drugs [see Warnings and Precautions (5.3) and Drug Interactions (7.3)] . (Fachinformation zu Bupropion, Gegenanzeigen)

SEZABY is contraindicated in patients with: acute porphyrias [see Warnings and Precautions (5.8)], or a history of hypersensitivity reaction to phenobarbital or other barbiturates [see Warnings and Precautions (5.7)] Acute porphyrias (4) (Fachinformation zu Phenobarbital, Gegenanzeigen)

SEZABY is contraindicated in patients with: acute porphyrias [see Warnings and Precautions (5.8)], or a history of hypersensitivity reaction to phenobarbital or other barbiturates [see Warnings and Precautions (5.7)] Acute porphyrias (4) (Fachinformation zu Phenobarbital, Gegenanzeigen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

SEZABY is contraindicated in patients with: acute porphyrias [see Warnings and Precautions (5.8)], or a history of hypersensitivity reaction to phenobarbital or other barbiturates [see Warnings and Precautions (5.7)] Acute porphyrias (4) (Fachinformation zu Phenobarbital, Gegenanzeigen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

• Coadministration with carbamazepine, oxcarbazepine, phenobarbital, phenytoin, rifampin, and rifapentine. (Fachinformation zu Cabotegravir, Gegenanzeigen)

Avoid chronic co-administration of strong CYP3A4 inducers (e.g., phenytoin, carbamazepine, rifampin, rifabutin, rifapentine, phenobarbital, St. (Fachinformation zu Cabozantinib, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS Depressants The concomitant use of EQUETRO and other CNS depressants can increase the risk of respiratory depression, profound sedation, hypotension, and syncope. (Fachinformation zu Carbamazepin, Arzneimittelwechselwirkungen)

Avoid concurrent use of Carbinoxamine Maleate Extended-Release Oral Suspension with alcohol or other central nervous system depressants because additional impairment of central nervous system performance may occur. (Fachinformation zu Carbinoxamin, Warnhinweise und Vorsichtsmaßnahmen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Avoid concurrent use of QUZYTTIR with alcohol or other CNS depressants because additional reduction in alertness and additional impairment of CNS performance may occur. (Fachinformation zu Cetirizin, Warnhinweise und Vorsichtsmaßnahmen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Avoid use with other central nervous system (CNS) depressants ( 5.3 ) (Fachinformation zu Clonidin, Warnhinweise und Vorsichtsmaßnahmen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

…elbasvir/grazoprevir Lipid modifying agents: lomitapide, lovastatin, simvastatin Opioid Antagonist: naloxegol PDE-5 inhibitor: sildenafil when used for treatment of pulmonary arterial hypertension Sedatives/hypnotics: orally administered midazolam, triazolam Co-administration of PREZISTA/ritonavir is contraindicated with drugs that are highly dependent on CYP3A for clearance… (Fachinformation zu Darunavir, Gegenanzeigen)

Co-administration of PREZCOBIX or PREZCOBIX PED with CYP3A inducers may lead to lower exposures of darunavir and cobicistat and potential loss of efficacy of darunavir and possible resistance. (Fachinformation zu Darunavir und Cobicistat, Gegenanzeigen)

If concomitant administration of a strong CYP3A4 inducer cannot be avoided, consider a dose increase [see Dosage and Administration ( 2.3 )] . (Fachinformation zu Dasatinib, Arzneimittelwechselwirkungen)

Avoid use of moderate or strong CYP3A4 inducers with EMFLAZA, as they may reduce efficacy ( 7.1 ) (Fachinformation zu Deflazacort, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CONTRAINDICATIONS Diphenoxylate hydrochloride and atropine sulfate is contraindicated in: • Pediatric patients less than 6 years of age due to the risks of respiratory and central nervous system (CNS) depression (see WARNINGS ). (Fachinformation zu Diphenoxylat und Atropin, Gegenanzeigen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

PIFELTRO is contraindicated when co-administered with drugs that are strong cytochrome P450 (CYP)3A enzyme inducers as significant decreases in doravirine plasma concentrations may occur, which may decrease the effectiveness of PIFELTRO [see Warnings and Precautions (5.2) , Drug Interactions (7.1) , and Clinical Pharmacology (12.3) ] . (Fachinformation zu Doravirin, Gegenanzeigen)

• Avoid concomitant use of doxorubicin hydrochloride with inhibitors and inducers of CYP3A4, CYP2D6, and/or P-gp ( 7.1 ) (Fachinformation zu Doxorubicin, Arzneimittelwechselwirkungen)

Central nervous system (CNS) depressants: Concurrent use with alcohol or other CNS depressants is not recommended ( 5.1 ) (Fachinformation zu Doxylamin und Pyridoxin, Warnhinweise und Vorsichtsmaßnahmen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Therefore, concomitant use with strong CYP3A inducers is not recommended [see Drug Interactions (7.1) and Clinical Pharmacology (12.3) ] . (Fachinformation zu Elexacaftor, Tezacaftor und Ivacaftor, Warnhinweise und Vorsichtsmaßnahmen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Alpha 1-adrenoreceptor antagonist: alfuzosin Anticonvulsants: carbamazepine, phenobarbital, phenytoin Antimycobacterial: rifampin Antipsychotics: lurasidone, pimozide Ergot Derivatives: dihydroergotamine, ergotamine, methylergonovine Herbal Products: St. (Fachinformation zu Elvitegravir, Cobicistat, Emtricitabin und Tenofovir, Gegenanzeigen)

…virologic response and possible resistance to COMPLERA or to the class of NNRTIs [see Warnings and Precautions (5.7) , Drug Interactions (7) , and Clinical Pharmacology (12.3) ]: Anticonvulsants: carbamazepine, oxcarbazepine, phenobarbital, phenytoin Antimycobacterials: rifampin, rifapentine Glucocorticoid (systemic): dexamethasone (more than a single-dose)… (Fachinformation zu Emtricitabin, Rilpivirin und Tenofovir, Gegenanzeigen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Etravirine should not be used in combination with carbamazepine, phenobarbital, or phenytoin as co-administration may cause significant decreases in etravirine plasma concentrations and loss of therapeutic effect of Etravirine. (Fachinformation zu Etravirin, Arzneimittelwechselwirkungen)

IT IS NOT KNOWN WHETHER CONCOMITANT USE OF OTHER ANTIEPILEPTIC DRUGS AND/OR OTHER DRUGS AFFECT THE INCIDENCE OF HEPATIC FAILURE. (Fachinformation zu Felbamat, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Preventing or Managing DI The concomitant use of ADDYI with CYP3A4 inducers is not recommended. (Fachinformation zu Flibanserin, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

…Hypericum perforatum ) Lipid modifying agents: Lomitapide, lovastatin, simvastatin Non-nucleoside reverse transcriptase inhibitor: Delavirdine PDE5 inhibitor: Sildenafil (Revatio) (for treatment of pulmonary arterial hypertension) Sedative/hypnotics: Midazolam, triazolam Hypersensitivity to fosamprenavir calcium or amprenavir (e.g., Stevens-Johnson syndrome). (Fachinformation zu Fosamprenavir, Gegenanzeigen)

• Respiratory Depression: May occur with NEURONTIN when used with concomitant central nervous system (CNS) depressants, including opioids, or in the setting of underlying respiratory impairment. (Fachinformation zu Gabapentin, Warnhinweise und Vorsichtsmaßnahmen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

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

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

To avoid phenytoin intoxication, appropriate adjustment of the anticonvulsant should be made 5,6 . (Fachinformation zu Isoniazid, Arzneimittelwechselwirkungen)

Anticonvulsants Carbamazepine Not recommended 2 weeks before, during, and 2 weeks after TOLSURA treatment. (Fachinformation zu Itraconazol, Arzneimittelwechselwirkungen)

Avoid concomitant use of CYP3A4 inducers when using Corlanor. (Fachinformation zu Ivabradin, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Avoid strong CYP3A4 inducers. (Fachinformation zu Lapatinib, Arzneimittelwechselwirkungen)

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

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Concomitant administration of SUNLENCA with oxcarbazepine or phenobarbital is not recommended. (Fachinformation zu Lenacapavir, Arzneimittelwechselwirkungen)

Avoid concurrent use of alcohol or other central nervous system depressants with XYZAL. (Fachinformation zu Levocetirizin, Warnhinweise und Vorsichtsmaßnahmen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

KALETRA once daily in combination with carbamazepine, phenobarbital, or phenytoin is not recommended. (Fachinformation zu Lopinavir und Ritonavir, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Effect of Other Drugs on LORBRENA Strong CYP3A Inducers LORBRENA is contraindicated in patients taking strong CYP3A inducers [see Contraindication (4) ] . (Fachinformation zu Lorlatinib, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Strong CYP3A4 inducers (rifampin) reduce exposure to macitentan: avoid co-administration with OPSUMIT ( 7.1 , 12.3 ). (Fachinformation zu Macitentan, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

SEZABY is contraindicated in patients with: acute porphyrias [see Warnings and Precautions (5.8)], or a history of hypersensitivity reaction to phenobarbital or other barbiturates [see Warnings and Precautions (5.7)] Acute porphyrias (4) (Fachinformation zu Phenobarbital, Gegenanzeigen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Avoid co-administration of mifepristone and CYP3A inducers such as rifampin, rifabutin, rifapentin, phenobarbital, phenytoin, carbamazepine, and St. (Fachinformation zu Mifepriston, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

John's Wort) Clinical Impact Significant decrease in plasma naldemedine concentrations, which may reduce efficacy [see Clinical Pharmacology (12.3) ] Intervention Avoid use of SYMPROIC with strong CYP3A inducers. (Fachinformation zu Naldemedin, Arzneimittelwechselwirkungen)

Risk of Recurrent Respiratory and CNS Depression : A recurrence of respiratory depression is possible, therefore, keep the patient under continued surveillance and administer repeat doses of ZURNAI using a new auto-injector with each dose while awaiting emergency medical assistance. (Fachinformation zu Nalmefen, Warnhinweise und Vorsichtsmaßnahmen)

Strong CYP3A4 inducers (e.g., rifampin) : Decreased concentrations of naloxegol; concomitant use is not recommended. (Fachinformation zu Naloxegol, Arzneimittelwechselwirkungen)

CYP2B6 Inducers (e.g., ritonavir, lopinavir, efavirenz, carbamazepine, phenobarbital, and phenytoin) may reduce efficacy by reducing bupropion exposure, avoid concomitant use. (Fachinformation zu Naltrexon und Bupropion, Arzneimittelwechselwirkungen)

• Central Nervous System Depression Xyrem (sodium oxybate) is a CNS depressant. (Fachinformation zu Natriumoxybat, Boxed Warning (umrahmter Warnhinweis))

John’s Wort reduce the bioavailability and efficacy of nifedipine; therefore nifedipine should not be used in combination with strong CYP3A inducers such as rifampin (See CONTRAINDICATIONS ). (Fachinformation zu Nifedipin, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

…contraindicated with drugs that are primarily metabolized by CYP3A and for which elevated concentrations are associated with serious and/or life-threatening reactions and drugs that are strong CYP3A inducers where significantly reduced nirmatrelvir or ritonavir plasma concentrations may be associated with the potential for loss of virologic response and possible resistance. (Fachinformation zu Nirmatrelvir und Ritonavir, Gegenanzeigen)

Counsel patients to use a back-up method or alternative method of contraception when enzyme inducers are used with COCs ( 7.1 ) -- - ---------- ------ USE IN SPECIFIC POPULATIONS---- -- -- --------- ---- Lactation: Not recommended; Lo Loestrin Fe can decrease milk production ( 8.2 ) (Fachinformation zu Norethisteron und Ethinylestradiol, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

• Avoid concurrent use of alcohol or other central nervous system depressants with olopatadine hydrochloride nasal solution (nasal spray) ( 5.2 ). (Fachinformation zu Olopatadin, Warnhinweise und Vorsichtsmaßnahmen)

• Avoid concurrent use of alcohol or other central nervous system (CNS) depressants with RYALTRIS because additional reductions in alertness and additional impairment of CNS performance may occur. (Fachinformation zu Olopatadin und Mometason, Warnhinweise und Vorsichtsmaßnahmen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

• CYP3A Inducers: Avoid concurrent use of IBRANCE with strong CYP3A inducers. (Fachinformation zu Palbociclib, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

VOTRIENT is not recommended if chronic use of strong CYP3A4 inducers cannot be avoided. (Fachinformation zu Pazopanib, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Phenelzine sulfate should not be used in combination with dextromethorphan or with CNS depressants such as alcohol and certain narcotics. (Fachinformation zu Phenelzin, Gegenanzeigen)

SEZABY is contraindicated in patients with: acute porphyrias [see Warnings and Precautions (5.8)], or a history of hypersensitivity reaction to phenobarbital or other barbiturates [see Warnings and Precautions (5.7)] Acute porphyrias (4) (Fachinformation zu Phenobarbital, Gegenanzeigen)

…spasms in the urinary tract collection system, inactivation of nerve and muscle cells after administration of drugs to relax the muscles (depolarization block after depolarizing muscle relaxants), in case of intoxication due to “irreversibly acting” cholinesterase inhibitors (drugs used to treat dementia), intoxication with phosphoric acid esters or barbiturates. (Fachinformation zu Physostigmin, Gegenanzeigen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

• Patients taking strong Cytochrome P450 3A enzyme (CYP3A) inducers, such as rifampin, [see Warnings and Precautions ( 5.6 ) and Drug Interactions ( 7.1 , 7.2 )] . (Fachinformation zu Praziquantel, Gegenanzeigen)

• Respiratory Depression : May occur with LYRICA when used with concomitant CNS depressants or in the setting of underlying respiratory impairment. (Fachinformation zu Pregabalin, Warnhinweise und Vorsichtsmaßnahmen)

SEZABY is contraindicated in patients with: acute porphyrias [see Warnings and Precautions (5.8)], or a history of hypersensitivity reaction to phenobarbital or other barbiturates [see Warnings and Precautions (5.7)] Acute porphyrias (4) (Fachinformation zu Phenobarbital, Gegenanzeigen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Table 2: Drugs That are Contraindicated with EDURANT and EDURANT PED Drug Class Contraindicated Drugs in Class Clinical Comment Anticonvulsants Carbamazepine Oxcarbazepine Phenobarbital Phenytoin Potential for significant decreases in rilpivirine plasma concentrations due to CYP3A enzyme induction, which may result in loss of virologic response. (Fachinformation zu Rilpivirin, Gegenanzeigen)

• Strong and Moderate CYP3A Inducers: Avoid concomitant administration. (Fachinformation zu Rimegepant, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

• Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Fachinformation zu Ritlecitinib, Arzneimittelwechselwirkungen)

WARNING: DRUG-DRUG INTERACTIONS LEADING TO POTENTIALLY SERIOUS AND/OR LIFE THREATENING REACTIONS Co-administration of NORVIR with several classes of drugs including sedative hypnotics, antiarrhythmics, or ergot alkaloid preparations may result in potentially serious and/or life-threatening adverse events due to possible effects of NORVIR on the hepatic metabolism… (Fachinformation zu Ritonavir, Boxed Warning (umrahmter Warnhinweis))

Avoid concomitant use of XARELTO with drugs that are known combined P-gp and strong CYP3A inducers [see Drug Interactions (7.3) ] . (Fachinformation zu Rivaroxaban, Warnhinweise und Vorsichtsmaßnahmen)

Therefore the use of strong cytochrome P450 inducers (e.g., rifampicin, phenobarbital, carbamazepine, and phenytoin) with DALIRESP is not recommended [see Warnings and Precautions (5.4) and Clinical Pharmacology (12.3) ]. (Fachinformation zu Roflumilast, Arzneimittelwechselwirkungen)

Intervention: Avoid the use of VARUBI in patients who require chronic administration of strong CYP3A4 inducers. (Fachinformation zu Rolapitant, Arzneimittelwechselwirkungen)

• Avoid use with rifampin and strong CYP3A4 inducers ( 7.3 ). (Fachinformation zu Romidepsin, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, 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)

Anticonvulsants: carbamazepine phenytoin phenobarbital ↓ sofosbuvir ↓ velpatasvir ↓ voxilaprevir Coadministration is not recommended. (Fachinformation zu Sofosbuvir und Velpatasvir, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

• Strong CYP3A Inducers: Avoid strong CYP3A4 inducers. (Fachinformation zu Sorafenib, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

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)

• Avoid use with strong CYP3A inhibitors or CYP3A inducers. (Fachinformation zu Ticagrelor, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Avoid concomitant use of SAMSCA with strong CYP3A inducers. (Fachinformation zu Tolvaptan, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

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

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; DEPENDENCE AND WITHDRAWAL REACTIONS AFTER USE OF SEZABY FOR A LONGER DURATION THAN RECOMMENDED; and ABUSE, MISUSE AND ADDICTION WITH UNAPPROVED USE IN ADOLESCENTS AND ADULTS Risks from Concomitant Use with Opioids Concomitant use of phenobarbital products, including SEZABY, and opioids may result in profound sedation,… (Fachinformation zu Phenobarbital, Boxed Warning (umrahmter Warnhinweis))

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Avoid concomitant use with strong CYP3A inducers if possible. (Fachinformation zu Tretinoin, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Strong CYP3A4 Inducers: Should be avoided as concomitant use will result in reduction of ubrogepant exposure. (Fachinformation zu Ubrogepant, Arzneimittelwechselwirkungen)

Ella should not be administered with CYP3A4 inducers [see Drug interactions (7.1) and Clinical Pharmacology (12.3) ] . (Fachinformation zu Ulipristal, Warnhinweise und Vorsichtsmaßnahmen)

Strong CYP3A4 Inducers : Coadministration of RINVOQ/RINVOQ LQ with strong CYP3A4 inducers is not recommended. (Fachinformation zu Upadacitinib, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Children under the age of two years are at a considerably increased risk of developing fatal hepatotoxicity, especially those on multiple anticonvulsants, those with congenital metabolic disorders, those with severe seizure disorders accompanied by mental retardation, and those with organic brain disease. (Fachinformation zu Valproat-Seminatrium (Divalproex), Boxed Warning (umrahmter Warnhinweis))

Children under the age of two years are at a considerably increased risk of developing fatal hepatotoxicity, especially those on multiple anticonvulsants, those with congenital metabolic disorders, those with severe seizure disorders accompanied by mental retardation, and those with organic brain disease. (Fachinformation zu Valproinsäure, Boxed Warning (umrahmter Warnhinweis))

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

Strong CYP3A Inducers : Avoid concomitant use with strong CYP3A inducers. (Fachinformation zu Vepdegestrant, Arzneimittelwechselwirkungen)

Drugs that Prolong the QT Interval : Avoid concomitant use. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

CNS depressants: Closely monitor for sedation and respiratory depression. (Fachinformation zu Phenobarbital, Arzneimittelwechselwirkungen)

By decreasing the gastrointestinal absorption of primidone, acetazolamide may decrease serum concentrations of primidone and its metabolites, with a consequent possible decrease in anticonvulsant effect. (Fachinformation zu Acetazolamid, Arzneimittelwechselwirkungen)

Anticonvulsants Salicylic acid can displace protein-bound phenytoin and valproic acid, leading to a decrease in the total concentration of phenytoin and an increase in serum valproic acid levels. (Fachinformation zu Acetylsalicylsäure und Dipyridamol, Arzneimittelwechselwirkungen)

Risk of Neurologic Symptoms: Neurocysticercosis patients may experience cerebral hypertensive episodes, seizures or focal neurologic deficits after initiation of therapy; begin appropriate steroid and anticonvulsant therapy. (Fachinformation zu Albendazol, Warnhinweise und Vorsichtsmaßnahmen)

Inform patients also that the central nervous system depressant effects of allopurinol tablets may be additive to those of alcohol and other CNS depressants. (Fachinformation zu Allopurinol, Warnhinweise und Vorsichtsmaßnahmen)

30% increase Phenobarbital (PB) Similar to aminoglutethimide. (Fachinformation zu Aminophyllin, Arzneimittelwechselwirkungen)

Blood pressure should be closely monitored when amlodipine is co-administered with CYP3A inducers. (Fachinformation zu Amlodipin, Arzneimittelwechselwirkungen)

Blood pressure should be closely monitored when amlodipine is co-administered with CYP3A inducers. (Fachinformation zu Amlodipin und Atorvastatin, Arzneimittelwechselwirkungen)

Blood pressure should be monitored when amlodipine is coadministered with CYP3A4 inducers (e.g. rifampicin, St. (Fachinformation zu Amlodipin und Benazepril, Arzneimittelwechselwirkungen)

Blood pressure should be closely monitored when amlodipine is co-administered with CYP3A inducers. (Fachinformation zu Amlodipin und Olmesartan, Arzneimittelwechselwirkungen)

Blood pressure should be closely monitored when amlodipine is coadministered with CYP3A inducers (e.g. rifampicin, St. (Fachinformation zu Amlodipin und Valsartan, Arzneimittelwechselwirkungen)

Amoxapine may enhance the response to alcohol and the effects of barbiturates and other CNS depressants. (Fachinformation zu Amoxapin, Arzneimittelwechselwirkungen)

…cyclophosphamide, flutamide, hydroxyurea, ifosfamide, rasburicase Antibiotics dapsone, nitrofurantoin, para-aminosalicylic acid, sulfonamides Antimalarials chloroquine, primaquine Anticonvulsants phenobarbital, phenytoin, sodium valproate Other drugs acetaminophen, metoclopramide, quinine, sulfasalazine Monoamine Oxidase Inhibitors, Nonselective Beta-Adrenergic… (Fachinformation zu Articain und Adrenalin, Arzneimittelwechselwirkungen)

CYP3A4/5 Inducers Co-administration of rifampin, a strong inducer of CYP3A4/5, reduced the plasma exposure of axitinib in healthy volunteers. (Fachinformation zu Axitinib, Arzneimittelwechselwirkungen)

Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants and corticosteroids) should be monitored and treated with established standards of care. (Fachinformation zu Beclometason, Warnhinweise und Vorsichtsmaßnahmen)

Alcohol, barbiturates or narcotics: Concomitant administration of thiazide diuretics with alcohol, barbiturates, or narcotics may potentiate orthostatic hypotension. (Fachinformation zu Benazepril und Hydrochlorothiazid, Arzneimittelwechselwirkungen)

Clinically Significant Interactions with Bexagliflozin Tablets UGT Enzyme Inducers Clinical Impact UGT Enzyme Inducers may significantly reduce exposure to bexagliflozin and lead to a decreased efficacy [ see Clinical Pharmacology ( 12.3 )]. (Fachinformation zu Bexagliflozin, Arzneimittelwechselwirkungen)

Inducers of CYP450 liver enzymes The simultaneous administration of bismuth subcitrate potassium, metronidazole and tetracycline hydrochloride and drugs that induce microsomal liver enzymes, such as phenytoin or phenobarbital, may accelerate the elimination of metronidazole, resulting in reduced plasma concentrations of metronidazole. (Fachinformation zu Bismutsubcitrat, Metronidazol und Tetracyclin, Arzneimittelwechselwirkungen)

Alcohol, barbiturates, or narcotics - potentiation of orthostatic hypotension may occur. (Fachinformation zu Bisoprolol und Hydrochlorothiazid, Vorsichtsmaßnahmen)

Use with CNS depressants may result in an additive or potentiating effect. (Fachinformation zu Brimonidin, Arzneimittelwechselwirkungen)

Use with CNS depressants may result in an additive or potentiating effect. (Fachinformation zu Brimonidin und Timolol, Arzneimittelwechselwirkungen)

Therefore, potent inhibitors or inducers of CYP3A4 may increase or reduce the circulating levels of CYCLOSET, respectively. (Fachinformation zu Bromocriptin, Arzneimittelwechselwirkungen)

Central Nervous System (CNS) depressants Antihistamines have additive effects with alcohol and other CNS depressants (hypnotics, sedatives, tranquilizers, antianxiety agents, etc.). Antihypertensive drugs Sympathomimetic may reduce the effects of antihypertensive drugs. (Fachinformation zu Brompheniramin, Pseudoephedrin und Dextromethorphan, Arzneimittelwechselwirkungen)

Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, post menopausal status, tobacco use, advance age, poor nutrition, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids) should be monitored and treated with established standards of care. (Fachinformation zu Budesonid, Warnhinweise und Vorsichtsmaßnahmen)

Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, postmenopausal status, tobacco use, advanced age, poor nutrition, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids) should be monitored and treated with established standards of care. (Fachinformation zu Budesonid und Formoterol, Warnhinweise und Vorsichtsmaßnahmen)

Possible early warning signs of central nervous system (CNS) toxicity are restlessness, anxiety, incoherent speech, lightheadedness, numbness and tingling of the mouth and lips, metallic taste, tinnitus, dizziness, blurred vision, tremors, twitching, CNS depression, or drowsiness. (Fachinformation zu Bupivacain, Warnhinweise und Vorsichtsmaßnahmen)

Possible early warning signs of central nervous system (CNS) toxicity are restlessness, anxiety, incoherent speech, lightheadedness, numbness and tingling of the mouth and lips, metallic taste, tinnitus, dizziness, blurred vision, tremors, twitching, CNS depression, or drowsiness. (Fachinformation zu Bupivacain und Adrenalin, Warnhinweise und Vorsichtsmaßnahmen)

Triazolam/flurazepam: Coadministration of buspirone with either triazolam or flurazepam did not appear to prolong or intensify the sedative effects of either benzodiazepine. (Fachinformation zu Buspiron, Arzneimittelwechselwirkungen)

Phenytoin/Phenobarbital The coadministration of phenytoin or phenobarbital will not affect plasma concentrations of calcitriol, but may reduce endogenous plasma levels of 25(OH)D 3 by accelerating metabolism. (Fachinformation zu Calcitriol, Arzneimittelwechselwirkungen)

Examples: Rifampin, phenytoin, phenobarbital, ritonavir Insulin or Insulin Secretagogues Clinical Impact: The risk of hypoglycemia is increased when INVOKANA is used concomitantly with insulin secretagogues (e.g., sulfonylurea) or insulin. (Fachinformation zu Canagliflozin, Arzneimittelwechselwirkungen)

Interactions with Hydrochlorothiazide Alcohol, barbiturates, or narcotics − Potentiation of orthostatic hypotension may occur. (Fachinformation zu Candesartan und Hydrochlorothiazid, Arzneimittelwechselwirkungen)

Consider alternative drugs to phenobarbital. (Fachinformation zu Carmustin, Arzneimittelwechselwirkungen)

Inducers of Hepatic CYP Enzymes Rifampin : Rifampin is a potent CYP3A4 inducer and concomitant administration with caspofungin acetate for injection is expected to reduce the plasma concentrations of caspofungin acetate for injection. (Fachinformation zu Caspofungin, Arzneimittelwechselwirkungen)

Phenobarbital and Clobazam: Reduce dosage as needed when used concomitantly with XCOPRI. (Fachinformation zu Cenobamat, Arzneimittelwechselwirkungen)

…procaine, ropivacaine, tetracaine Antineoplastic agents cyclophosphamide, flutamide, hydroxyurea, ifosfamide, rasburicase Antibiotics dapsone, nitrofurantoin, para-aminosalicylic acid, sulfonamides Antimalarials chloroquine, primaquine Anticonvulsants Phenobarbital, phenytoin, sodium valproate Other drugs acetaminophen, metoclopramide, quinine, sulfasalazine (Fachinformation zu Chloroprocain, Vorsichtsmaßnahmen)

Alcohol, Barbiturates, or Narcotics - potentiation of orthostatic hypotension may occur. (Fachinformation zu Chlorothiazid, Arzneimittelwechselwirkungen)

Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants and oral corticosteroids) should be monitored and treated with established standards of care. (Fachinformation zu Ciclesonid, Warnhinweise und Vorsichtsmaßnahmen)

John’s Wort rifampin oxcarbazepine octreotide phenobarbital orlistat phenytoin sulfinpyrazone terbinafine ticlopidine Bosentan Coadministration of bosentan (250 to 1000 mg every 12 hours based on tolerability) and cyclosporine (300 mg every 12 hours for 2 days then dosing to achieve a C min of 200 to 250 ng/mL) for 7 days in healthy subjects resulted in decreases… (Fachinformation zu Ciclosporin, Arzneimittelwechselwirkungen)

Use with CNS Depressants Clemastine has additive effects with alcohol and other CNS depressants (hypnotics, sedatives, tranquilizers, etc.). Use in Activities Requiring Mental Alertness Patients should be warned about engaging in activities requiring mental alertness such as driving a car or operating appliances, machinery, etc. (Fachinformation zu Clemastin, Warnhinweise)

Inducers of CYP3A4 and CYP3A5 Inducers of CYP3A4 and/or CYP3A5 may reduce plasma concentrations of clindamycin. (Fachinformation zu Clindamycin, Arzneimittelwechselwirkungen)

Administration of CMI has been reported to increase the plasma levels of phenobarbital, if given concomitantly ( see CLINICAL PHARMACOLOGY, Interactions ). (Fachinformation zu Clomipramin, Arzneimittelwechselwirkungen)

Drug Interactions Cholestyramine for Oral Suspension USP may delay or reduce the absorption of concomitant oral medication such as phenylbutazone, warfarin, thiazide diuretics (acidic), or propranolol (basic), as well as tetracycline, penicillin G, phenobarbital, thyroid and thyroxine preparations, estrogens and progestins, and digitalis. (Fachinformation zu Colestyramin, Arzneimittelwechselwirkungen)

CNS Depressants Antihistamines may have additive effects with alcohol and other CNS depressants, e.g., hypnotics, sedatives, tranquilizers, antianxiety agents. (Fachinformation zu Cyproheptadin, Warnhinweise)

The concomitant use of Exjade with potent UGT inducers (e.g., rifampicin, phenytoin, phenobarbital, ritonavir) may result in a decrease in Exjade efficacy due to a possible decrease in deferasirox concentration. (Fachinformation zu Deferasirox, Arzneimittelwechselwirkungen)

Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate, rifabutin, rufinamide, aprepitant, and products containing St. (Fachinformation zu Desogestrel und Ethinylestradiol, Arzneimittelwechselwirkungen)

Use with CNS Depressants CORPHENA Oral Solution has additive effects with alcohol and other CNS depressants (hypnotics, sedatives, tranquilizers, etc.). Use in Activities Requiring Mental Alertness Patients should be warned about engaging in activities requiring mental alertness such as driving a car or operating appliances, machinery, etc. (Fachinformation zu Dexchlorpheniramin, Warnhinweise)

Clinically Relevant Interactions Affecting DEXILANT When Coadministered with Other Drugs and Substances CYP2C19 or CYP3A4 Inducers Clinical Impact: Decreased exposure of dexlansoprazole when used concomitantly with strong inducers [see Clinical Pharmacology (12.3) ] . (Fachinformation zu Dexlansoprazol, Arzneimittelwechselwirkungen)

Exercise caution when prescribing ZIPSOR with concomitant drugs that are known to be potentially hepatotoxic (e.g., acetaminophen, antibiotics, antiepileptics). (Fachinformation zu Diclofenac, Warnhinweise und Vorsichtsmaßnahmen)

Exercise caution when prescribing diclofenac sodium/misoprostol with concomitant drugs that are known to be potentially hepatotoxic (e.g., antibiotics, anti-epileptics). (Fachinformation zu Diclofenac und Misoprostol, Warnhinweise und Vorsichtsmaßnahmen)

MOTOFEN ® may potentiate the action of barbiturates, tranquilizers, narcotics, and alcohol. (Fachinformation zu Difenoxin und Atropin, Arzneimittelwechselwirkungen)

The concomitant use of alcohol or other central nervous system depressants may have an additive effect. (Fachinformation zu Dimenhydrinat, Warnhinweise)

Drug Interactions Diphenhydramine hydrochloride has additive effects with alcohol and other CNS depressants (hypnotics, sedatives, tranquilizers, etc). (Fachinformation zu Diphenhydramin, Arzneimittelwechselwirkungen)

Potential additive effects when used in combination with CNS depressants or sedating antihistamines. (Fachinformation zu Doxepin, Warnhinweise und Vorsichtsmaßnahmen)

Examples Glutethimide and phenobarbital Intervention If a patient initiates or discontinues therapy with an enzyme inducer, dose adjustment of doxercalciferol may be necessary. (Fachinformation zu Doxercalciferol, Arzneimittelwechselwirkungen)

Barbiturates, carbamazepine and phenytoin decrease the half-life of doxycycline. (Fachinformation zu Doxycyclin, Arzneimittelwechselwirkungen)

Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampin, topiramate and products containing St. (Fachinformation zu Drospirenon und Ethinylestradiol, Arzneimittelwechselwirkungen)

Potential for Other Drugs to Affect Efavirenz Drugs that induce CYP3A activity (e.g., phenobarbital, rifampin, rifabutin) would be expected to increase the clearance of efavirenz resulting in lowered plasma concentrations [ see Dosage and Administration ( 2.2 ) ]. (Fachinformation zu Efavirenz, Arzneimittelwechselwirkungen)

Drugs that induce CYP3A activity (e.g., phenobarbital, rifampin, rifabutin) would be expected to increase the clearance of EFV resulting in lowered plasma concentrations. (Fachinformation zu Efavirenz, Lamivudin und Tenofovir, Arzneimittelwechselwirkungen)

Other Agents Anticonvulsants: carbamazepine oxcarbazepine phenobarbital phenytoin ↓ TAF Consider alternative anticonvulsant. (Fachinformation zu Emtricitabin und Tenofovir, Arzneimittelwechselwirkungen)

Hydrochlorothiazide When administered concurrently the following drugs may interact with thiazide diuretics: Alcohol, barbiturates, or narcotics Potentiation of orthostatic hypotension may occur. (Fachinformation zu Enalapril und Hydrochlorothiazid, Arzneimittelwechselwirkungen)

CYP3A4 Inducers Pre-treatment with a CYP3A4 inducer prior to erlotinib decreased erlotinib exposure [see Clinical Pharmacology (12.3) ]. (Fachinformation zu Erlotinib, Arzneimittelwechselwirkungen)

If focal tremors, myoclonus, or seizures occur, patients should be evaluated neurologically, placed on anticonvulsant therapy if not already instituted, and the dosage of INVANZ re-examined to determine whether it should be decreased or discontinued. (Fachinformation zu Ertapenem, Warnhinweise und Vorsichtsmaßnahmen)

Phenobarbital or Primidone: Higher dosage of APTIOM may be necessary. (Fachinformation zu Eslicarbazepin, Arzneimittelwechselwirkungen)

Table 4: Clinically Relevant Interactions Affecting Esomeprazole When Co-Administered with Other Drugs CYP2C19 or CYP3A4 Inducers Clinical Impact: Decreased exposure of esomeprazole when used concomitantly with strong inducers [see Clinical Pharmacology (12.3) ]. (Fachinformation zu Esomeprazol, Arzneimittelwechselwirkungen)

John's Wort preparations (Hypericum perforatum), phenobarbital, carbamazepine, and rifampin may reduce plasma concentrations of estrogens, possibly resulting in a decrease in therapeutic effects and/or changes in the uterine bleeding profile. (Fachinformation zu Estradiol, Arzneimittelwechselwirkungen)

Women who take medications that are strong CYP3A4 inducers should not choose Natazia as their oral contraceptive while using these inducers and for at least 28 days after discontinuation of these inducers due to the possibility of increased breakthrough bleeding and/or decreased contraceptive efficacy. (Fachinformation zu Estradiol und Dienogest, Arzneimittelwechselwirkungen)

John's wort ( Hypericum perforatum ) preparations, phenobarbital, carbamazepine, and rifampin may reduce plasma concentrations of estrogens, possibly resulting in a decrease in therapeutic effects and/or changes in the uterine bleeding profile. (Fachinformation zu Estradiol und Norethisteron, Arzneimittelwechselwirkungen)

Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include: phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate, rifabutin, rufinamide, aprepitant, and products containing St. (Fachinformation zu Etonogestrel und Ethinylestradiol, Arzneimittelwechselwirkungen)

Strong CYP3A inducer and P-gp inducer : Increase the dosage as recommended. (Fachinformation zu Everolimus, Arzneimittelwechselwirkungen)

Strong CYP 3A4 inducers: Concomitant use of strong CYP 3A4 inducers decreases exemestane exposure. (Fachinformation zu Exemestan, Arzneimittelwechselwirkungen)

Anticonvulsants - In a pharmacokinetic study, maximum plasma concentrations of felodipine were considerably lower in epileptic patients on long-term anticonvulsant therapy (e.g., phenytoin, carbamazepine, or phenobarbital) than in healthy volunteers. (Fachinformation zu Felodipin, Arzneimittelwechselwirkungen)

Intervention: When phenobarbital is added to or withdrawn from treatment, dosage adjustment of FENOPROFEN CALCIUM may be required. (Fachinformation zu Fenoprofen, Arzneimittelwechselwirkungen)

CYP3A4 Inducers No dosing adjustments are recommended in the presence of CYP3A4 inducers, such as rifampin and carbamazepine. (Fachinformation zu Fesoterodin, Arzneimittelwechselwirkungen)

Barbiturates, phenytoin, or rifampin —increased metabolic clearance of fludrocortisone acetate because of the induction of hepatic enzymes. (Fachinformation zu Fludrocortison, Arzneimittelwechselwirkungen)

Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, postmenopausal status, tobacco use, advanced age, poor nutrition, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids), should be monitored and treated with established standards of care. (Fachinformation zu Fluticason, Warnhinweise und Vorsichtsmaßnahmen)

Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids) should be monitored and treated with established standards of care. (Fachinformation zu Fluticason und Salmeterol, Warnhinweise und Vorsichtsmaßnahmen)

Effects of VYKOURA on Other Drugs Certain Antiepileptic Drugs Increase monitoring for seizure activity in patients taking certain concomitant antiepileptic drugs. (Fachinformation zu Folinsäure (Leucovorin), Arzneimittelwechselwirkungen)

Diese Antiepileptika senken die Folatspiegel, und Folsäurepräparate können ihrerseits die Blutspiegel des Arzneistoffs senken. (NIH Office of Dietary Supplements, Folate)

CYP3A4 Interactions: Fosaprepitant is a weak inhibitor of CYP3A4, and aprepitant, the active moiety, is a substrate, inhibitor, and inducer of CYP3A4; see Full Prescribing Information for recommendations regarding contraindications, risk of adverse reactions, and dosage adjustment of FOCINVEZ and concomitant drugs. (Fachinformation zu Fosaprepitant, Warnhinweise und Vorsichtsmaßnahmen)

John's wort may vary widely based on preparation. theophylline Drugs that may either increase or decrease phenytoin serum levels Antiepileptic drugs Phenobarbital, valproate sodium, valproic acid 7.2 Drugs Affected by Phenytoin or CEREBYX Table 7 includes commonly occurring drug interactions affected by phenytoin (the active metabolite of CEREBYX). (Fachinformation zu Fosphenytoin, Arzneimittelwechselwirkungen)

• CYP3A4 Inducer: Increase IRESSA to 500 mg daily in patients receiving a strong CYP3A4 inducer. (Fachinformation zu Gefitinib, Arzneimittelwechselwirkungen)

…including glimepiride, leading to worsening glycemic control: danazol, glucagon, somatropin, protease inhibitors, atypical antipsychotic medications (e.g., olanzapine and clozapine), barbiturates, diazoxide, laxatives, rifampin, thiazides and other diuretics, corticosteroids, phenothiazines, thyroid hormones, estrogens, oral contraceptives, phenytoin, nicotinic… (Fachinformation zu Glimepirid, 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)

Barbiturates usually depress griseofulvin activity by decreasing plasma levels and concomitant administration may require a dosage adjustment of the antifungal agent. (Fachinformation zu Griseofulvin, Arzneimittelwechselwirkungen)

Consider the potential for additive sedative effects with CNS depressant drugs. (Fachinformation zu Guanfacin, Warnhinweise und Vorsichtsmaßnahmen)

Concomitant administration of inducers of CYP3A4 may lead to decreases in serum concentrations of ALKINDI SPRINKLE and increase the risk of adverse reactions, including adrenal crisis. (Fachinformation zu Hydrocortison, Arzneimittelwechselwirkungen)

• CYP3A4 Inducers: Monitor for increased toxicity when used in combination with CYP3A4 inducers. (Fachinformation zu Ifosfamid, Arzneimittelwechselwirkungen)

CYP3A4 inducers may decrease Gleevec C max and area under curve (AUC). (Fachinformation zu Imatinib, Arzneimittelwechselwirkungen)

If focal tremors, myoclonus, or seizures occur, patients should be evaluated neurologically, placed on anticonvulsant therapy if not already instituted, and the dosage of PRIMAXIN re-examined to determine whether it should be decreased, or the antibacterial drug discontinued ( 5.2 ). (Fachinformation zu Imipenem und Cilastatin, Warnhinweise und Vorsichtsmaßnahmen)

Imipramine hydrochloride may enhance the CNS depressant effects of alcohol. (Fachinformation zu Imipramin, Warnhinweise)

Concomitant Use with CYP3A Inducers Use of KALYDECO with strong CYP3A inducers, such as rifampin, substantially decreases the exposure of ivacaftor, which may reduce the therapeutic effectiveness of KALYDECO. (Fachinformation zu Ivacaftor, Warnhinweise und Vorsichtsmaßnahmen)

John's Wort (Hypericum perforatum) preparations, phenobarbital, carbamazepine, and rifampin, may reduce plasma concentrations of some estrogens, possibly resulting in a decrease in therapeutic effects and/or changes in the uterine bleeding profile. (Fachinformation zu Konjugierte Estrogene und Bazedoxifen, Arzneimittelwechselwirkungen)

Anyone considering prescribing VIMPAT or any other AED must balance this risk with the risk of untreated illness. (Fachinformation zu Lacosamid, Warnhinweise und Vorsichtsmaßnahmen)

Carbamazepine, phenytoin, phenobarbital, primidone, and rifampin decrease lamotrigine concentrations by approximately 40%. (Fachinformation zu Lamotrigin, Arzneimittelwechselwirkungen)

Clinically Relevant Interactions Affecting PREVACID or PREVACID SoluTab When Coadministered with Other Drugs CYP2C19 OR CYP3A4 Inducers Clinical Impact: Decreased exposure of lansoprazole when used concomitantly with strong inducers [see Clinical Pharmacology (12.3) ] . (Fachinformation zu Lansoprazol, Arzneimittelwechselwirkungen)

Anticonvulsants: carbamazepine phenytoin phenobarbital ↓ ledipasvir ↓ sofosbuvir Coadministration of ledipasvir and sofosbuvir with carbamazepine, phenytoin, or phenobarbital is expected to decrease the concentration of ledipasvir and sofosbuvir, leading to reduced therapeutic effect of ledipasvir and sofosbuvir. (Fachinformation zu Ledipasvir und Sofosbuvir, Arzneimittelwechselwirkungen)

Effects of Leucovorin Products on Other Drugs Antiepileptic Drugs Folic acid in large amounts may counteract the antiepileptic effect of phenobarbital, phenytoin and primidone and increase the frequency of seizures in susceptible children. (Fachinformation zu Levofolinsäure (Levoleucovorin), Arzneimittelwechselwirkungen)

Enzyme inducers (e.g., CYP3A4) : May decrease the effectiveness of TYBLUME or increase breakthrough bleeding. (Fachinformation zu Levonorgestrel und Ethinylestradiol, Arzneimittelwechselwirkungen)

Drug or Drug Class Effect Phenobarbital Rifampin Phenobarbital has been shown to reduce the response to thyroxine. (Fachinformation zu Levothyroxin, Arzneimittelwechselwirkungen)

Possible early warning signs of central nervous system (CNS) toxicity are restlessness, anxiety, incoherent speech, lightheadedness, metallic taste, tinnitus, dizziness, blurred vision, tremors, twitching, CNS depression, or drowsiness. (Fachinformation zu Lidocain und Adrenalin, Warnhinweise und Vorsichtsmaßnahmen)

…prilocaine, procaine, ropivacaine, tetracaine Antineoplastic agents cyclophosphamide, flutamide, hydroxyurea, isofamide, rasburicase Antibiotics dapsone, nitrofurantoin, para-aminosalicylic acid, sufonamides Antimalarials chloroquine, primaquine Anticonvulsants Phenobarbital, phenytoin, sodium valproate Other drugs acetaminophen, metoclopramide, quinine, sulfasalazine (Fachinformation zu Lidocain und Prilocain, Arzneimittelwechselwirkungen)

Strong P-glycoprotein/CYP3A4 inducer: The efficacy of TRADJENTA may be reduced when administered in combination (e.g., with rifampin). (Fachinformation zu Linagliptin, Arzneimittelwechselwirkungen)

Inducers of P-glycoprotein or CYP3A4 Enzymes Clinical Impact Rifampin decreased linagliptin exposure, suggesting that the efficacy of linagliptin may be reduced when administered in combination with a strong P-gp or CYP3A4 inducer. (Fachinformation zu Linagliptin und Metformin, Arzneimittelwechselwirkungen)

Drug or Drug Class Effect Phenobarbital Rifampin Phenobarbital has been shown to reduce the response to thyroxine. (Fachinformation zu Liothyronin, Arzneimittelwechselwirkungen)

Alcohol, barbiturates, or narcotics - potentiation of orthostatic hypotension may occur. (Fachinformation zu Lisinopril und Hydrochlorothiazid, Arzneimittelwechselwirkungen)

Increased Risk of CNS Depression with Concomitant use of CNS Depressant Drugs : Lofexidine tablets potentiates the CNS depressant effects of benzodiazepines and may potentiate the CNS depressant effects of alcohol, barbiturates, and other sedating drugs. (Fachinformation zu Lofexidin, Warnhinweise und Vorsichtsmaßnahmen)

• If patients with severe renal impairment or ESRD receiving SELZENTRY (without concomitant CYP3A inducers or inhibitors) experience postural hypotension, the dose of SELZENTRY should be reduced from 300 mg twice daily to 150 mg twice daily. (Fachinformation zu Maraviroc, Warnhinweise und Vorsichtsmaßnahmen)

• Coadministration of meclizine hydrochloride with other CNS depressants, including alcohol, may result in increased CNS depression ( 7.1 ). (Fachinformation zu Meclozin, Arzneimittelwechselwirkungen)

MPA Injectable Suspension, USP can pose an additional risk in patients with risk factors for osteoporosis (e.g., metabolic bone disease, chronic alcohol and/or tobacco use, anorexia nervosa, strong family history of osteoporosis or chronic use of drugs that can reduce bone mass such as anticonvulsants or corticosteroids). (Fachinformation zu Medroxyprogesteron, Warnhinweise und Vorsichtsmaßnahmen)

Anticonvulsants In patients taking an anticonvulsant (e.g., valproic acid, carbamazepine, phenobarbital or phenytoin), the concomitant use of mefloquine may reduce seizure control by lowering the plasma levels of the anticonvulsant. (Fachinformation zu Mefloquin, Arzneimittelwechselwirkungen)

Inducers of CYP3A4 (e.g., phenytoin, carbamazepine, dexamethasone, rifampin, and phenobarbital) could increase the rate of elimination of donepezil. (Fachinformation zu Memantin und Donepezil, Arzneimittelwechselwirkungen)

…procaine, ropivacaine, tetracaine Antineoplastic agents cyclophosphamide, flutamide, hydroxyurea, ifosfamide, rasburicase Antibiotics dapsone, nitrofurantoin, para-aminosalicylic acid, sulfonamides Antimalarials chloroquine, primaquine Anticonvulsants phenobarbital, phenytoin, sodium valproate Other drugs acetaminophen, metoclopramide, quinine, sulfasalazine (Fachinformation zu Mepivacain, Arzneimittelwechselwirkungen)

Additive Effects Since the effects of meprobamate and alcohol or meprobamate and other CNS depressants or psychotropic drugs may be additive,appropriate caution should be exercised with patients who take more than one of these agents simultaneously. (Fachinformation zu Meprobamat, Warnhinweise)

Drug Interactions Since Celontin (methsuximide) may interact with concurrently administered antiepileptic drugs, periodic serum level determinations of these drugs may be necessary (eg, methsuximide may increase the plasma concentrations of phenytoin and phenobarbital). (Fachinformation zu Mesuximid, Arzneimittelwechselwirkungen)

CYP3A4 inducers Drugs (e.g. nevirapine, rifampin) that are strong inducers of CYP3A4 are likely to decrease the pharmacological action of methylergonovine maleate. (Fachinformation zu Methylergometrin, Arzneimittelwechselwirkungen)

Hepatic Enzyme Inducers (e.g., barbiturates, phenytoin, carbamazepine, rifampin) : Drugs which induce cytochrome P450 3A4 enzyme activity may enhance the metabolism of corticosteroids and require that the dosage of the corticosteroid be increased. (Fachinformation zu Methylprednisolon, Arzneimittelwechselwirkungen)

Concurrent use of metyrosine with alcohol or other CNS depressants can increase their sedative effects. (Fachinformation zu Metirosin, Arzneimittelwechselwirkungen)

Concomitant use of central nervous system (CNS) depressants or drugs associated with EPS may increase this effect (e.g., alcohol, sedatives, hypnotics, opiates, and anxiolytics). (Fachinformation zu Metoclopramid, Warnhinweise und Vorsichtsmaßnahmen)

Alcohol, Barbiturates, And Narcotics The hypotensive effects of these drugs may be potentiated by the volume contraction that may be associated with metolazone therapy. (Fachinformation zu Metolazon, Arzneimittelwechselwirkungen)

Inducers of CYP450 Liver Enzymes The simultaneous administration of LIKMEZ and drugs that induce microsomal liver enzymes, such as phenytoin or phenobarbital, may accelerate the elimination of metronidazole, resulting in reduced plasma concentrations of metronidazole. (Fachinformation zu Metronidazol, Arzneimittelwechselwirkungen)

John's Wort, tramadol, tryptophan, buspirone Strong CYP3A Inducers Clinical Impact The concomitant use of strong CYP3A inducers with REMERON/REMERONSolTab decreases the plasma concentration of mirtazapine [see Clinical Pharmacology (12.3) ] . (Fachinformation zu Mirtazapin, Arzneimittelwechselwirkungen)

Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants and corticosteroids) should be monitored and treated with established standards of care. (Fachinformation zu Mometason, Warnhinweise und Vorsichtsmaßnahmen)

WARNINGS AND PRECAUTIONS Risk of Recurrent Respiratory and CNS Depression : Due to the duration of action of naloxone relative to the opioid, respiratory and CNS depression may recur after the first dose of naloxone. (Fachinformation zu Naloxon, Warnhinweise und Vorsichtsmaßnahmen)

Table 4: Clinically Significant Interactions with Esomeprazole Magnesium - Affecting Co-Administered Drugs CYP2C19 or CYP3A4 Inducers Clinical Impact : Decreased exposure of esomeprazole when used concomitantly with strong inducers [see Clinical Pharmacology (12.3) ]. (Fachinformation zu Naproxen und Esomeprazol, Arzneimittelwechselwirkungen)

Anticonvulsants: Carbamazepine, clonazepam, ethosuximide Plasma concentrations of nevirapine and the anticonvulsant may be decreased. (Fachinformation zu Nevirapin, Arzneimittelwechselwirkungen)

Possible Reduced Efficacy with Strong CYP3A4 Inducers Concomitant use of strong CYP3A4 inducers (e.g., carbamazepine, phenobarbital, phenytoin, rifampin, St. (Fachinformation zu Nimodipin, Warnhinweise und Vorsichtsmaßnahmen)

Coadministration with oral doses of a P-gp and CYP3A4 inducer, rifampicin, decreased exposure to nintedanib by 50%. (Fachinformation zu Nintedanib, Arzneimittelwechselwirkungen)

Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate, rifabutin, rufinamide, aprepitant, and products containing St. (Fachinformation zu Norelgestromin und Ethinylestradiol, Arzneimittelwechselwirkungen)

Some drugs or herbal products that may decrease the effectiveness of HCs include efavirenz, phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, rifabutin, rufinamide, aprepitant, and products containing St. (Fachinformation zu Norethisteron, Arzneimittelwechselwirkungen)

Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate, rifabutin, rufinamide, aprepitant, and products containing St. (Fachinformation zu Norgestimat und Ethinylestradiol, Arzneimittelwechselwirkungen)

Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate rifabutin, rufinamide, aprepitant, and products containing St. (Fachinformation zu Norgestrel und Ethinylestradiol, Arzneimittelwechselwirkungen)

Blood pressure should be closely monitored when amlodipine is co-administered with CYP3A inducers. (Fachinformation zu Olmesartan, Amlodipin und Hydrochlorothiazid, Arzneimittelwechselwirkungen)

Table 4: Clinically Relevant Interactions Affecting Omeprazole When Co-Administered with Other Drugs CYP2C19 or CYP3A4 Inducers Clinical Impact: Decreased exposure of omeprazole when used concomitantly with strong inducers [see Clinical Pharmacology ( 12.3 )] . (Fachinformation zu Omeprazol, Arzneimittelwechselwirkungen)

Table 6: Clinically Relevant Interactions Affecting Omeprazole when Co-Administered with Other Drugs CYP2C19 or CYP3A4 Inducers Clinical Impact: Decreased exposure of omeprazole when used concomitantly with strong inducers [see Clinical Pharmacology ( 12.3 )] . (Fachinformation zu Omeprazol und Natriumhydrogencarbonat, Arzneimittelwechselwirkungen)

Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Fachinformation zu Orlistat, Warnhinweise und Vorsichtsmaßnahmen)

Carbamazepine, Phenytoin, and Phenobarbital: Decreased plasma levels of MHD (the active metabolite). (Fachinformation zu Oxcarbazepin, Arzneimittelwechselwirkungen)

Patients should be carefully observed for signs of central nervous system (CNS) depression, such as somnolence and sedation, when FYCOMPA is used with other drugs with sedative properties because of potential additive effects. (Fachinformation zu Perampanel, Warnhinweise und Vorsichtsmaßnahmen)

The concomitant use of alcohol or central nervous system (CNS) depressant drugs with phentermine and topiramate extended-release capsules may potentiate CNS depression or other centrally mediated effects of these agents, such as dizziness, cognitive adverse reactions, drowsiness, light-headedness, impaired coordination, and somnolence. (Fachinformation zu Phentermin und Topiramat, Warnhinweise und Vorsichtsmaßnahmen)

Additionally, consider alternatives to structurally similar drugs such as carboxamides (e.g., carbamazepine) and hydantoins (e.g., phenytoin) in these same patients. (Fachinformation zu Phenobarbital, Warnhinweise und Vorsichtsmaßnahmen)

…including glimepiride, leading to worsening glycemic control: danazol, glucagon, somatropin, protease inhibitors, atypical antipsychotic medications (e.g., olanzapine and clozapine), barbiturates, diazoxide, laxatives, rifampin, thiazides and other diuretics, corticosteroids, phenothiazines, thyroid hormones, estrogens, oral contraceptives, phenytoin, nicotinic… (Fachinformation zu Pioglitazon und Glimepirid, Arzneimittelwechselwirkungen)

CYP 3A4 inducers (e.g. barbiturates, phenytoin, carbamazepine, and rifampin): Drugs such as barbiturates, phenytoin, ephedrine, and rifampin, which induce hepatic microsomal drug metabolizing enzyme activity may enhance metabolism of prednisolone and require that the dosage of Orapred be increased. (Fachinformation zu Prednisolon, Arzneimittelwechselwirkungen)

CYP 3A4 inducers and inhibitors: May, respectively, increase or decrease clearance of corticosteroids, necessitating dose adjustment. (Fachinformation zu Prednison, Arzneimittelwechselwirkungen)

…cyclophosphamide, flutamide, hydroxyurea, ifosfamide, rasburicase Antibiotics dapsone, nitrofurantoin, para-aminosalicylic acid, sulfonamides Antimalarials chloroquine, primaquine Anticonvulsants phenobarbital, phenytoin, sodium valproate Other drugs acetaminophen, metoclopramide, quinine, sulfasalazine The administration of local anesthetic injections containing… (Fachinformation zu Prilocain und Adrenalin, Arzneimittelwechselwirkungen)

Protriptyline may enhance the response to alcohol and the effects of barbiturates and other CNS depressants. (Fachinformation zu Protriptylin, Arzneimittelwechselwirkungen)

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

Drug Interactions Effect of Rifabutin on the Pharmacokinetics of Other Drugs Rifabutin induces CYP3A enzymes and therefore may reduce the plasma concentrations of drugs metabolized by those enzymes. (Fachinformation zu Rifabutin, Arzneimittelwechselwirkungen)

…Hormonal Contraceptives Prevention or Management: Advise patients to change to non-hormonal methods of birth control during rifampin therapy Estrogens Decrease exposure Progestins Anticonvulsants Phenytoin Administered with rifampin 450 mg daily Decrease exposure Antiarrhythmics Disopyramide Decrease exposure Mexiletine Decrease exposure Quinidine Decrease exposure… (Fachinformation zu Rifampicin, Arzneimittelwechselwirkungen)

…Disopyramide, mexiletine, quinidine, tocainide Antibiotics Chloramphenicol, clarithromycin, dapsone, doxycycline; Fluoroquinolones (such as ciprofloxacin) Oral Anticoagulants Warfarin Anticonvulsants Phenytoin Antimalarials Quinine Azole Antifungals Fluconazole, itraconazole, ketoconazole Antipsychotics Haloperidol Barbiturates Phenobarbital Benzodiazepines Diazepam… (Fachinformation zu Rifapentin, Arzneimittelwechselwirkungen)

Reduced Rocuronium Bromide Injection activity possible : Anticonvulsants. (Fachinformation zu Rocuronium, Arzneimittelwechselwirkungen)

…cyclophosphamide, flutamide, hydroxyurea, ifosfamide, rasburicase Antibiotics dapsone, nitrofurantoin, para-aminosalicylic acid, sulfonamides Antimalarials chloroquine, primaquine Anticonvulsants Phenobarbital, phenytoin, sodium valproate Other drugs acetaminophen, metoclopramide, quinine, sulfasalazine NAROPIN should be used with caution in patients receiving… (Fachinformation zu Ropivacain, Arzneimittelwechselwirkungen)

Table 6: Summary of drug-drug interactions of BANZEL with other antiepileptic drugs AED Co-administered Influence of Rufinamide on AED concentration a) Influence of AED on Rufinamide concentration Carbamazepine Decrease by 7 to 13% b) Decrease by 19 to 26% Dependent on dose of carbamazepine Lamotrigine Decrease by 7 to 13% b) No Effect Phenobarbital Increase… (Fachinformation zu Rufinamid, Arzneimittelwechselwirkungen)

Strong CYP3A4 Inducers Concomitant use of JAKAFI/JAKAFI XR with strong CYP3A4 inducers may decrease ruxolitinib exposure [ see Clinical Pharmacology ( 12.3 )] , which may reduce efficacy of JAKAFI/JAKAFI XR. (Fachinformation zu Ruxolitinib, Arzneimittelwechselwirkungen)

Inhibitors of Folate Synthesis (e.g., methotrexate, valproic acid, phenobarbital, trimethoprim) Clinical Impact In vitro and in vivo nonclinical data suggest that drugs that inhibit folate synthesis may decrease the bioavailability of endogenous BH4 by inhibiting the enzyme dihydrofolate reductase, which is involved in the recycling (regeneration) of BH4. (Fachinformation zu Sapropterin, Arzneimittelwechselwirkungen)

Weigh this potential risk against the benefits before prescribing TRANSDERM SCŌP to patients with a history of seizures, including those receiving anti-epileptic medication or who have risk factors that can lower the seizure threshold. (Fachinformation zu Scopolamin, Warnhinweise und Vorsichtsmaßnahmen)

Drugs that induce CYP3A4 (e.g., phenytoin, carbamazepine, nafcillin, phenobarbital, and rifampin) should be used with caution. (Fachinformation zu Selegilin, Arzneimittelwechselwirkungen)

Alcohol, barbiturates, or narcotics: Potentiation of orthostatic hypotension may occur. (Fachinformation zu Spironolacton und Hydrochlorothiazid, Arzneimittelwechselwirkungen)

• CYP3A4 Inducers : Consider dose increase of SUTENT when administered with strong CYP3A4 inducers. (Fachinformation zu Sunitinib, Arzneimittelwechselwirkungen)

CYP3A4 inhibitors (e.g. ketoconazole, ritonavir) increase CIALIS exposure ( 2.7 , 5.10 , 7.2 ) requiring dose adjustment: CIALIS for use as needed: no more than 10 mg every 72 hours CIALIS for once daily use: dose not to exceed 2.5 mg CYP3A4 inducers (e.g. rifampin) decrease CIALIS exposure ( 7.2 ). (Fachinformation zu Tadalafil, Arzneimittelwechselwirkungen)

Patients should be monitored for adequate clinical effect when amlodipine is co-administered with CYP3A4 inducers. (Fachinformation zu Telmisartan und Amlodipin, 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)

Terbinafine clearance is increased 100% by rifampin, a CYP450 enzyme inducer, and decreased 33% by cimetidine, a CYP450 enzyme inhibitor. (Fachinformation zu Terbinafin, Arzneimittelwechselwirkungen)

30% increase Phenobarbital (PB) Similar to aminoglutethimide. (Fachinformation zu Theophyllin, Arzneimittelwechselwirkungen)

Use of tiagabine HCl without enzyme-inducing antiepileptic drugs results in blood levels about twice those attained in the studies on which current dosing recommendations are based (see DOSAGE AND ADMINISTRATION ). (Fachinformation zu Tiagabin, Warnhinweise)

Phenytoin, fosphenytoin: Adjustment of anticonvulsant and/or tinidazole dose(s) may be needed ( 7.1, 7.2 ) (Fachinformation zu Tinidazol, Arzneimittelwechselwirkungen)

…exposure to tofacitinib Intervention Dosage modification of XELJANZ/XELJANZ XR is recommended [see Dosage and Administration (2) , Clinical Pharmacology, Figure 3 (12.3) ] Strong CYP3A4 Inducers (e.g., rifampin) Clinical Impact Decreased exposure to tofacitinib and may result in loss of or reduced clinical response Intervention Concomitant use with XELJANZ/XELJANZ… (Fachinformation zu Tofacitinib, Arzneimittelwechselwirkungen)

Because of the potential of topiramate to cause CNS depression, as well as other cognitive and/or neuropsychiatric adverse reactions, topiramate extended-release capsules should be used with extreme caution if used in combination with alcohol and other CNS depressants. (Fachinformation zu Topiramat, Arzneimittelwechselwirkungen)

Excessive reduction of blood glucose (additive effect) f CNS depressant agents (including opioids, alcohol, sedatives, hypnotics) Use with caution d Increased CNS depression Dietary supplements containing sympathomimetics Contraindicated a Antidepressants including but not limited to: Other MAOIs (e.g., linezolid, intravenous methylene blue, selective MAOIs)… (Fachinformation zu Tranylcypromin, Arzneimittelwechselwirkungen)

Co-administration of a CYP2C8 enzyme inducer (e.g., rifampin) may decrease exposure to treprostinil. (Fachinformation zu Treprostinil, Warnhinweise und Vorsichtsmaßnahmen)

Hepatic enzyme inducers (e.g., barbiturates, phenytoin, carbamazepine, rifampin): Drugs which induce hepatic microsomal drug metabolizing enzyme activity may enhance the metabolism of corticosteroids and require that the dosage of the corticosteroid be increased. (Fachinformation zu Triamcinolon, Arzneimittelwechselwirkungen)

Drug Interactions Cannabinoids, barbiturates, opiates, and alcohol may have additive effects with trihexyphenidyl, and thus, an abuse potential exists. (Fachinformation zu Trihexyphenidyl, Arzneimittelwechselwirkungen)

The recent use of other drugs that cause CNS depression or EPS symptoms may also increase the risk; consider reducing the dosage or discontinuing the drug. (Fachinformation zu Trimethobenzamid, Warnhinweise und Vorsichtsmaßnahmen)

Thiopental Reconstituted vecuronium, which has an acid pH, should not be mixed with alkaline solutions (e.g., barbiturate solutions such as thiopental) in the same syringe or administered simultaneously during intravenous infusion through the same needle or through the same intravenous line (see DOSAGE AND ADMINISTRATION -COMPATIBILITY ). (Fachinformation zu Vecuronium, Vorsichtsmaßnahmen)

Phenobarbital Phenobarbital therapy may increase verapamil clearance. (Fachinformation zu Verapamil, Arzneimittelwechselwirkungen)

CYP3A4 Inducers: Consider increasing VIIBRYD dosage by 2-fold, up to 80 mg once-daily over 1 to 2 weeks when used concomitantly with strong CYP3A4 inducers for greater than 14 days ( 2.4 , 7 ). (Fachinformation zu Vilazodon, Arzneimittelwechselwirkungen)

Drug Interactions The simultaneous oral or intravenous administration of phenytoin and antineoplastic chemotherapy combinations that included vincristine sulfate has been reported to reduce blood levels of the anticonvulsant and to increase seizure activity. (Fachinformation zu Vincristin, Arzneimittelwechselwirkungen)

…etravirine, fluconazole, fluvastatin, fluvoxamine, metronidazole, miconazole, oxandrolone, sulfinpyrazone, tigecycline, voriconazole, zafirlukast aprepitant, bosentan, carbamazepine, phenobarbital, rifampin CYP1A2 acyclovir, allopurinol, caffeine, cimetidine, ciprofloxacin, disulfiram, enoxacin, famotidine, fluvoxamine, methoxsalen, mexiletine, norfloxacin, oral… (Fachinformation zu Warfarin, Arzneimittelwechselwirkungen)

Patients should be carefully observed for signs of central nervous system (CNS) depression, such as somnolence and sedation, when ZONISADE is used with other drugs with sedative properties because of potential additive effects. (Fachinformation zu Zonisamid, Warnhinweise und Vorsichtsmaßnahmen)

Concomitant taking of P-gp inducers (including but not limited to rifampicin, carbamazepine, phenytoin, phenobarbital, and St. (Fachinformation zu Afatinib, Arzneimittelwechselwirkungen)

Atracurium besylate injection, which has an acid pH, should not be mixed with alkaline solutions (e.g., barbiturate solutions) in the same syringe or administered simultaneously during intravenous infusion through the same needle. (Fachinformation zu Atracurium, Warnhinweise)

Anticonvulsant therapy can be given if clinically indicated. (Fachinformation zu Cefalexin, Warnhinweise und Vorsichtsmaßnahmen)

Anticonvulsant therapy should be continued in patients with known seizure disorders. (Fachinformation zu Cefazolin, Warnhinweise und Vorsichtsmaßnahmen)

…Probenecid Probenecid is known to interact with the metabolism or renal tubular excretion of many drugs (e.g., acetaminophen, acyclovir, angiotensin-converting enzyme inhibitors, aminosalicylic acid, barbiturates, benzodiazepines, bumetanide, clofibrate, methotrexate, famotidine, furosemide, nonsteroidal anti-inflammatory agents, theophylline, and zidovudine). (Fachinformation zu Cidofovir, Arzneimittelwechselwirkungen)

Antihistamines Amphetamines may counteract the sedative effect of antihistamines. (Fachinformation zu Dexamfetamin, Arzneimittelwechselwirkungen)

• Cytochrome P450 3A4 inducers, inhibitors, or substrates: May alter docetaxel metabolism. (Fachinformation zu Docetaxel, Arzneimittelwechselwirkungen)

Use alternative treatment that does not include carbamazepine where possible for INSTI-experienced patients with certain INSTI-associated resistance substitutions or clinically suspected INSTI resistance. b Oxcarbazepine Phenytoin Phenobarbital St. (Fachinformation zu Dolutegravir, Arzneimittelwechselwirkungen)

In Drug-Induced CNS and Respiratory Depression Doxapram alone may not stimulate adequate spontaneous breathing or provide sufficient arousal in patients who are severely depressed either due to respiratory failure or to CNS depressant drugs, but may be used as an adjunct to established supportive measures and resuscitative techniques. (Fachinformation zu Doxapram, Warnhinweise)

The “gasping syndrome” is characterized by central nervous system (CNS) depression, metabolic acidosis, and gasping respirations. (Fachinformation zu Epoetin alfa, Warnhinweise und Vorsichtsmaßnahmen)

Effects of Other Drugs on HALAVEN No drug-drug interactions are expected with CYP3A4 inhibitors, CYP3A4 inducers or P-glycoprotein (P-gp) inhibitors. (Fachinformation zu Eribulin, Arzneimittelwechselwirkungen)

Data are more extensive with respect to phenytoin and phenobarbital, but these are also the most commonly prescribed anticonvulsants; less systematic or anecdotal reports suggest a possible similar association with the use of all known anticonvulsant drugs. (Fachinformation zu Ethosuximid, Warnhinweise)

A similar association, though less marked, has been suggested for barbiturates, phenylbutazone, phenytoin sodium, and possibly with griseofulvin, ampicillin, and tetracyclines. (Fachinformation zu Etynodioldiacetat und Ethinylestradiol, Arzneimittelwechselwirkungen)

Potential for Glycerol Phenylbutyrate to Affect Other Drugs Drugs with narrow therapeutic index that are substrates of CYP3A4 Glycerol phenylbutyrate is a weak inducer of CYP3A4 in humans. (Fachinformation zu Glycerolphenylbutyrat, Arzneimittelwechselwirkungen)

Antiepileptic Drugs Sporadic cases of seizures have been reported during concomitant use of ketorolac tromethamine and antiepileptic drugs (phenytoin, carbamazepine). (Fachinformation zu Ketorolac, Arzneimittelwechselwirkungen)

Other Antiepileptic Drugs Potential drug interactions between levetiracetam and other AEDs (carbamazepine, gabapentin, lamotrigine, phenobarbital, phenytoin, primidone and valproate) were also assessed by evaluating the serum concentrations of levetiracetam and these AEDs during placebo-controlled clinical studies. (Fachinformation zu Levetiracetam, Arzneimittelwechselwirkungen)

Anticonvulsants, psychotropic, hormone preparations, corticosteroids, antithyroid agents, cyproheptadine: may affect the results of the metyrapone test. (Fachinformation zu Metyrapon, Arzneimittelwechselwirkungen)

When phenytoin or other hepatic enzyme inducers such as rifampin and phenobarbital have been taken concurrently with mexiletine, lowered mexiletine plasma levels have been reported. (Fachinformation zu Mexiletin, Arzneimittelwechselwirkungen)

…glycosides– digitalis and digoxin; (2) hypoglycemics–insulin, 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… (Fachinformation zu Prazosin, Arzneimittelwechselwirkungen)

The impact of other inducers of drug metabolizing enzymes, such as phenytoin and phenobarbital, on UGT1A1 is unknown. (Fachinformation zu Raltegravir, Arzneimittelwechselwirkungen)

CYP3A4 Substrates An in vitro study has suggested that rifaximin induces CYP3A4 [see Clinical Pharmacology ( 12.3 )] . (Fachinformation zu Rifaximin, Arzneimittelwechselwirkungen)

Strong CYP3A inducers: Strong inducers of CYP3A (for example, rifampin, phenytoin, carbamazepine, phenobarbital or St. (Fachinformation zu Riociguat, Arzneimittelwechselwirkungen)

These data suggest that GH may alter the clearance of compounds known to be metabolized by CYP450 liver enzymes (e.g., corticosteroids, sex steroids, anticonvulsants, and cyclosporine). (Fachinformation zu Tesamorelin, Arzneimittelwechselwirkungen)

Drug Interactions No clinically significant drug interactions have been found in studies of losartan potassium with hydrochlorothiazide, digoxin, warfarin, cimetidine and phenobarbital. (Fachinformation zu Losartan, Arzneimittelwechselwirkungen)

CYP2C19 and CYP3A4 Inducer Co-administration of Micafungin in Sodium Chloride Injection with rifampin and ritonavir did not alter the pharmacokinetics of micafungin. (Fachinformation zu Micafungin, Arzneimittelwechselwirkungen)

…adjustment is needed when SINGULAIR is co-administered with theophylline, prednisone, prednisolone, oral contraceptives, fexofenadine, digoxin, warfarin, gemfibrozil, itraconazole, thyroid hormones, sedative hypnotics, non-steroidal anti-inflammatory agents, benzodiazepines, decongestants, and Cytochrome P450 (CYP) enzyme inducers [see Clinical Pharmacology (12.3) ]. (Fachinformation zu Montelukast, Arzneimittelwechselwirkungen)