Fébuxostat : interactions médicamenteuses

Use of methylxanthines (e.g., caffeine, aminophylline and theophylline) is not recommended in patients who experience a seizures in association with adenosine injection ( 5.6 ) (notice Adénosine, Mises en garde et précautions)

…hormones Diuretics Cardiac glycosides, such as digitalis glycosides Quinidine Drugs potentiating hypokalemic effects of epinephrine • Potassium depleting diuretics • Corticosteroids • Theophylline Epinephrine should not be used to counteract circulatory collapse or hypotension caused by phenothiazines, as a reversal of the pressor effects of epinephrine may result… (notice Adrénaline, Interactions médicamenteuses)

WARNING: CARDIOVASCULAR DEATH Gout patients with established cardiovascular (CV) disease treated with ULORIC had a higher rate of CV death compared to those treated with allopurinol in a CV outcomes study [see Warnings and Precautions (5.1) ] . (notice Fébuxostat, Mise en garde encadrée)

ULORIC is contraindicated in patients being treated with azathioprine or mercaptopurine [see Drug Interactions (7) ] . (notice Fébuxostat, Contre-indications)

Serious Adverse Reactions with Concomitant Theophylline Serious and fatal reactions have been reported in patients receiving concurrent administration of ciprofloxacin and theophylline. (notice Ciprofloxacine, Mises en garde et précautions)

Avoid the use of Exjade with CYP1A2 substrate theophylline. (notice Déférasirox, Interactions médicamenteuses)

Theophylline or Aminophylline : Do not co-administer with KETALAR as concomitant use may lower the seizure threshold ( 7.1 ). (notice Kétamine, Interactions médicamenteuses)

ULORIC is contraindicated in patients being treated with azathioprine or mercaptopurine [see Drug Interactions (7) ] . (notice Fébuxostat, Contre-indications)

Quinine Prevention or Management : Avoid concomitant use Decrease AUC by 75%-85% Telithromycin Decrease AUC by 86% Theophylline Decrease exposure by 20%-40% Effect of Other Drugs on Rifampin Concomitant antacid administration may reduce the absorption of rifampin. (notice Rifampicine, Interactions médicamenteuses)

Phosphodiesterase Inhibitors Concomitant administration of Adempas with specific PDE-5 inhibitors (such as sildenafil, tadalafil, or vardenafil) or nonspecific PDE-5 inhibitors (such as dipyridamole or theophylline) is contraindicated [see Dosage and Administration (2.6), Drug Interactions ( 7.1 ) and Clinical Pharmacology ( 12.2 )]. (notice Riociguat, Contre-indications)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Sympathomimetics, Methylxanthines, Steroids In clinical studies, concurrent administration of aclidinium bromide and other drugs commonly used in the treatment of COPD including sympathomimetics (short-acting beta 2 agonists), methylxanthines, and oral and inhaled steroids showed no increases in adverse drug reactions. (notice Aclidinium, Interactions médicamenteuses)

Upon initiation or discontinuation of Adalimumab-fkjp in patients being treated with CYP450 substrates with a narrow therapeutic index, monitoring of the effect (e.g., warfarin) or drug concentration (e.g., cyclosporine or theophylline) is recommended and the individual dose of the drug product may be adjusted as needed. (notice Adalimumab, Interactions médicamenteuses)

Theophylline: Albendazole induces cytochrome P450 1A in human hepatoma cells; therefore, it is recommended that plasma concentrations of theophylline be monitored during and after treatment. (notice Albendazole, Interactions médicamenteuses)

Xanthine derivatives, steroids, diuretics, or non-potassium sparing diuretics may potentiate hypokalemia or ECG changes. (notice Arformotérol, Interactions médicamenteuses)

Consider use of prophylactic low-dose aspirin therapy in patients with a history of CV disease. (notice Fébuxostat, Mises en garde et précautions)

Consider use of prophylactic low-dose aspirin therapy in patients with a history of CV disease. (notice Fébuxostat, Mises en garde et précautions)

…also increase the risk of seizure: concomitant use of other medications that lower the seizure threshold (e.g., other bupropion products, antipsychotics, tricyclic antidepressants, theophylline, and systemic corticosteroids), metabolic disorders (e.g., hypoglycemia, hyponatremia, severe hepatic impairment, and hypoxia), or use of illicit drugs (e.g., cocaine)… (notice Bupropion, Mises en garde et précautions)

Consider use of prophylactic low-dose aspirin therapy in patients with a history of CV disease. (notice Fébuxostat, Mises en garde et précautions)

Consider use of prophylactic low-dose aspirin therapy in patients with a history of CV disease. (notice Fébuxostat, Mises en garde et précautions)

…Interactions It is not known if the effects of Butorphanol Tartrate Injection are altered by concomitant medications that affect hepatic metabolism of drugs (CYP 450 inhibitors or inducers) (e.g., erythromycin, theophylline, etc.), but physicians should be alert to the possibility that a smaller initial dose and longer intervals between doses may be needed. (notice Butorphanol, Interactions médicamenteuses)

Increases in exposure of certain CYP1A2 substrates (e.g., theophylline, tizanidine) may be observed when concomitantly used with EPIDIOLEX. (notice Cannabidiol (sur ordonnance), Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

There was a small decrease in the clearance of oral cetirizine hydrochloride caused by a 400-mg dose of theophylline; it is possible that larger theophylline doses could have a greater effect [see Clinical Pharmacology ( 12.3 )]. (notice Cétirizine, Interactions médicamenteuses)

…apparently through an effect on certain microsomal enzyme systems, has been reported to reduce the hepatic metabolism of warfarin-type anticoagulants, phenytoin, propranolol, nifedipine, chlordiazepoxide, diazepam, certain tricyclic antidepressants, lidocaine, theophylline, and metronidazole, thereby delaying elimination and increasing blood levels of these drugs. (notice Cimétidine, Interactions médicamenteuses)

Xanthine Derivatives: Theophylline Use With Caution Theophylline: Clarithromycin use in patients who are receiving theophylline may be associated with an increase of serum theophylline concentrations [see Pharmacokinetics ( 12.3 )] . (notice Clarithromycine, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Effects of Combined Hormonal Contraceptives on Other Drugs COCs containing EE may inhibit the metabolism of other compounds (e.g., cyclosporine, prednisolone, theophylline, tizanidine, and voriconazole) and increase their plasma concentrations. (notice Désogestrel et éthinylestradiol, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Drugs that Cause Hypokalemia The risk of hypokalemia is greater with coadministration of KEVEYIS and other drugs that can cause hypokalemia (e.g., loop diuretics, thiazide diuretics, laxatives, antifungals, penicillins, and theophylline) [see Warnings and Precautions (5.3) ] . (notice Diclofénamide, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

There may be an interaction between doxapram and aminophylline and between doxapram and theophylline manifested by increased skeletal muscle activity, agitation, and hyperactivity. (notice Doxapram, Interactions médicamenteuses)

…studies, administration of a hormonal contraceptive containing EE did not lead to any increase or only to a weak increase in plasma concentrations of CYP3A4 substrates (e.g., midazolam) while plasma concentrations of CYP2C19 substrates (e.g., omeprazole and voriconazole) and CYP1A2 substrates (e.g., theophylline and tizanidine) can have a weak or moderate increase. (notice Drospirénone et éthinylestradiol, Interactions médicamenteuses)

Tamsulosin Dosage adjustments are not necessary when tamsulosin is administered concomitantly with digoxin or theophylline [see Clinical Pharmacology (12.3) ]. (notice Dutastéride et tamsulosine, Interactions médicamenteuses)

Drug Interactions Theophylline Erythromycin use in patients who are receiving high doses of theophylline may be associated with an increase in serum theophylline levels and potential theophylline toxicity. (notice Érythromycine, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Effects of CHCs on Other Drugs CHCs containing ethinyl estradiol may inhibit the metabolism of other compounds (e.g., cyclosporine, prednisolone, theophylline, tizanidine, and voriconazole) and increase their plasma concentrations. (notice Étonogestrel et éthinylestradiol, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

(See CLINICAL PHARMACOLOGY: Drug Interaction Studies .) Theophylline Fluconazole increases the serum concentrations of theophylline. (notice Fluconazole, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Theophylline: Clearance decreased; reduce theophylline dose by one-third ( 5.8 ). (notice Fluvoxamine, Mises en garde et précautions)

• Xanthine derivatives, steroids, diuretics, or non-potassium sparing diuretics may potentiate hypokalemia or ECG changes. (notice Formotérol, Interactions médicamenteuses)

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). (notice Fosphénytoïne, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Upon initiation or discontinuation of RENFLEXIS in patients being treated with CYP450 substrates with a narrow therapeutic index, monitoring of the effect (e.g., warfarin) or drug concentration (e.g., cyclosporine or theophylline) is recommended and the individual dose of the drug product may be adjusted as needed. (notice Infliximab, Interactions médicamenteuses)

Theophylline A recent study has shown that concomitant administration of isoniazid and theophylline may cause elevated plasma levels of theophylline, and in some instances a slight decrease in the elimination of isoniazid. (notice Isoniazide, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Theophylline Clinical Impact: Increased clearance of theophylline [see Clinical Pharmacology (12.3) ] . (notice Lansoprazole, Interactions médicamenteuses)

In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (notice Léflunomide, Interactions médicamenteuses)

There was a small decrease (~16%) in the clearance of cetirizine caused by a 400 mg dose of theophylline. (notice Lévocétirizine, Interactions médicamenteuses)

However, concomitant administration of other fluoroquinolones with theophylline has resulted in prolonged elimination half-life, elevated serum theophylline levels, and a subsequent increase in the risk of theophylline-related adverse reactions in the patient population. (notice Lévofloxacine, Interactions médicamenteuses)

Concomitant use with ethinyl estradiol-containing CHCs may increase systemic exposure of other drugs (e.g., cyclosporine, prednisolone, theophylline, tizanidine, and voriconazole). (notice Lévonorgestrel et éthinylestradiol, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Effect of XATMEP on Other Drugs Theophylline Methotrexate may decrease the clearance of theophylline. (notice Méthotrexate, Interactions médicamenteuses)

Concurrent use of mexiletine and theophylline may lead to increased plasma theophylline levels. (notice Mexilétine, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

…may cause hypoglycemia concomitant administration of medications that may lower the seizure threshold, including other bupropion products, antipsychotics, tricyclic antidepressants, theophylline, systemic steroids Recommendations for Reducing the Risk of Seizure: Clinical experience with bupropion suggests that the risk of seizure may be minimized by adhering to… (notice Naltrexone et bupropion, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

FEV 1 measurements taken when theophylline and nefazodone were coadministered did not differ from baseline dosage (i.e., when theophylline was administered alone). (notice Néfazodone, Interactions médicamenteuses)

Effects of Combined Hormonal Contraceptives on Other Drugs CHCs containing EE may inhibit the metabolism of other compounds (e.g., cyclosporine, prednisolone, theophylline, tizanidine, and voriconazole) and increase their plasma concentrations. (notice Norelgestromine et éthinylestradiol, Interactions médicamenteuses)

Effects of Combined Oral Contraceptives on Other Drugs COCs containing EE may inhibit the metabolism of other compounds (e.g., cyclosporine, prednisolone, theophylline, tizanidine, and voriconazole) and increase their plasma concentrations. (notice Norgestimate et éthinylestradiol, Interactions médicamenteuses)

Effects of Combined Oral Contraceptives on Other Drugs COCs containing EE may inhibit the metabolism of other drugs (e.g., cyclosporine, prednisolone, theophylline, tizanidine, and voriconazole) and increase their plasma concentrations. (notice Norgestrel et éthinylestradiol, Interactions médicamenteuses)

This may result in a prolonged half-life for some drugs that are also metabolized by this system (e.g., cyclosporine, theophylline/methylxanthines, warfarin) when coadministered with quinolones. (notice Ofloxacine, Interactions médicamenteuses)

Consider use of prophylactic low-dose aspirin therapy in patients with a history of CV disease. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

John’s wort may vary widely based on preparation. , sucralfate, theophylline Drugs that may either increase or decrease phenytoin serum levels Antiepileptic drugs Phenobarbital, valproate sodium Valproate sodium and valproic acid are similar medications. (notice Phénytoïne, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Effects of Primaquine on the Pharmacokinetics of Other Drugs CYP1A2 Substrates Published clinical and non-clinical reports indicate primaquine inhibits CYP1A2 enzyme activity and thus may lead to increased exposure of CYP1A2 substrate drugs (e.g., duloxetine, alosetron, theophylline and tizanidine) when co-administered with Primaquine phosphate Tablets. (notice Primaquine, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Theophylline: Theophylline clearance may decrease when hyperthyroid patients on a stable theophylline regimen become euthyroid; a reduced dose of theophylline may be needed. (notice Propylthiouracile, Interactions médicamenteuses)

Theophylline or Aminophylline In 20 healthy subjects who received multiple doses of quinine sulfate (648 mg every 8 hours x 7 days) with a single 300 mg oral dose of theophylline, the quinine mean C max and AUC were increased by 13% and 14% respectively. (notice Quinine, Interactions médicamenteuses)

…Clofibrate Oral Hypoglycemics Sulfonylureas (e.g., glyburide, glipizide) Hormonal Contraceptives/Progestins Ethinyl estradiol, levonorgestrel Immunosuppressants Cyclosporine, tacrolimus Methylxanthines Theophylline Narcotic analgesics Methadone Phosphodiesterase-5 (PDE-5) Inhibitors Sildenafil Thyroid preparations Levothyroxine Tricyclic antidepressants Amitriptyline,… (notice Rifapentine, Interactions médicamenteuses)

Bronchodilator: theophylline ↓ theophylline Increased dosage of theophylline may be required; therapeutic monitoring should be considered. (notice Ritonavir, Interactions médicamenteuses)

Febuxostat Prevention or Management: In patients taking febuxostat, do not exceed a dosage of rosuvastatin tablets 20 mg once daily. (notice Rosuvastatine, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

Drug Interactions Some studies have shown that simultaneous sucralfate administration in healthy volunteers reduced the extent of absorption (bioavailability) of single doses of the following: cimetidine, digoxin, fluoroquinolone antibiotics, ketoconazole, l-thyroxine, phenytoin, quinidine, ranitidine, tetracycline, and theophylline. (notice Sucralfate, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

When tadalafil was administered to subjects taking theophylline, a small augmentation (3 beats per minute) of the increase in heart rate associated with theophylline was observed. (notice Tadalafil, Interactions médicamenteuses)

Digoxin and Theophylline Dosage adjustments are not necessary when a tamsulosin hydrochloride capsule is administered concomitantly with digoxin or theophylline [see Clinical Pharmacology ( 12.3 )] . (notice Tamsulosine, Interactions médicamenteuses)

The influence of terbinafine on the pharmacokinetics of fluconazole, cotrimoxazole (trimethoprim and sulfamethoxazole), zidovudine or theophylline was not considered to be clinically significant. (notice Terbinafine, Interactions médicamenteuses)

In patients taking AUBAGIO, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (notice Tériflunomide, Interactions médicamenteuses)

Therefore, use with caution when coadministering ULORIC with theophylline. (notice Fébuxostat, Interactions médicamenteuses)

Theophylline: Theophylline clearance may decrease when hyperthyroid patients on a stable theophylline regimen become euthyroid; a reduced dose of theophylline may be needed. (notice Thiamazole, Interactions médicamenteuses)

Concomitant Respiratory Medications SPIRIVA RESPIMAT has been used concomitantly with short-acting and long-acting sympathomimetic (beta-agonists) bronchodilators, methylxanthines, oral and inhaled steroids, antihistamines, mucolytics, leukotriene modifiers, cromones, and anti-IgE treatment without increases in adverse reactions. (notice Tiotropium, Interactions médicamenteuses)

Upon initiation or discontinuation of TOFIDENCE, in patients being treated with these types of medicinal products, perform therapeutic monitoring of effect (e.g., warfarin) or drug concentration (e.g., cyclosporine or theophylline) and the individual dose of the medicinal product adjusted as needed. (notice Tocilizumab, Interactions médicamenteuses)

In order to prevent gout flares when ULORIC is initiated, concurrent prophylactic treatment with an NSAID or colchicine is recommended [see Dosage and Administration (2.4) ]. (notice Fébuxostat, Mises en garde et précautions)

• Effect of Smoking Cessation on Other Drugs: Pharmacokinetics or pharmacodynamics of certain drugs (e.g., theophylline, warfarin, insulin) may be altered, necessitating dose adjustment. (notice Varénicline, Interactions médicamenteuses)

Theophylline Verapamil may inhibit the clearance and increase the plasma levels of theophylline. (notice Vérapamil, Interactions médicamenteuses)

Coadministration of zafirlukast (20 mg/day) or placebo at steady-state with a single dose of sustained release theophylline preparation (16 mg/kg) in 16 healthy boys and girls (6 through 11 years of age) resulted in no significant differences in the pharmacokinetic parameters of theophylline. (notice Zafirlukast, Précautions)

Zileuton increases theophylline levels. (notice Zileuton, Interactions médicamenteuses)

A bronchodilator, such as theophylline or a β2-stimulant, should be made available in advance with instructions concerning its use. (notice Acébutolol, Mises en garde)

Other xanthines such as caffeine, dyphylline, and pentoxifylline are not detected by these assays. (notice Aminophylline, Interactions médicamenteuses)

CYP1A2 substrates: AGRYLIN demonstrates limited inhibitory activity towards CYP1A2 in vitro and may alter the exposure of concomitant CYP1A2 substrates (e.g., theophylline, fluvoxamine, ondansetron). (notice Anagrélide, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

Such drugs include the following: Aminophylline, c isplatin, doxorubicin, felbamate, phosphenytoin, methsuximide , phenobarbital, phenytoin, primidone, rifampin and theophylline. (notice Carbamazépine, Interactions médicamenteuses)

…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). (notice Cidofovir, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

ATROVENT HFA has been used concomitantly with other drugs, including sympathomimetic bronchodilators, methylxanthines, oral and inhaled steroids commonly used in the treatment of COPD. (notice Ipratropium, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

Acetazolamide, Urea, Xanthine Preparations, Alkalinizing Agents Clinical Impact: Concomitant use can lower serum lithium concentrations by increasing urinary lithium excretion. (notice Lithium, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

Falsely high readings for theophylline have been reported in an in vitro study, using the Schack and Waxler technique, when therapeutic concentrations of theophylline and probenecid were added to human plasma. (notice Probénécide, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

Possible interactions with drugs known to be metabolized by CYP1A2 via competitive inhibition such as theophylline and imipramine may also occur. (notice Ropivacaïne, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

In Vivo Drug Interaction Studies Based on drug interaction studies in healthy patients, ULORIC does not have clinically significant interactions with colchicine, naproxen, indomethacin, hydrochlorothiazide, warfarin or desipramine [see Clinical Pharmacology (12.3) ]. (notice Fébuxostat, Interactions médicamenteuses)

The effect on CYP1A2 was explored further in a clinical interaction study with theophylline and no effect on metabolism was observed. (notice Alosétron, Interactions médicamenteuses)

Other Drugs: In healthy volunteers, amlodipine, phenytoin, glyburide, ranitidine, omeprazole, hormone replacement therapy (a combination of conjugated estrogens and medroxyprogesterone), antacid (aluminum and magnesium hydroxides), and theophylline did not affect the pharmacokinetics of dofetilide. (notice Dofétilide, Interactions médicamenteuses)

…Penciclovir No clinically significant alterations in penciclovir pharmacokinetics were observed following single-dose administration of 500 mg famciclovir after pretreatment with multiple doses of allopurinol, cimetidine, theophylline, zidovudine, promethazine, when given shortly after an antacid (magnesium and aluminum hydroxide), or concomitantly with emtricitabine. (notice Famciclovir, Interactions médicamenteuses)

Compounds that have been tested in man have included antipyrine, digoxin, propranolol, theophylline, and warfarin and no clinically meaningful interactions were found. (notice Finastéride, Interactions médicamenteuses)

No dose 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… (notice Montélukast, Interactions médicamenteuses)

Drug Interactions No interactions have been observed between nizatidine and theophylline, chlordiazepoxide, lorazepam, lidocaine, phenytoin, and warfarin. (notice Nizatidine, Interactions médicamenteuses)

Theophylline — Multiple doses of olanzapine did not affect the pharmacokinetics of theophylline or its metabolites. (notice Olanzapine, Interactions médicamenteuses)

Theophylline — Multiple doses of olanzapine did not affect the pharmacokinetics of theophylline or its metabolites. (notice Olanzapine et fluoxétine, Interactions médicamenteuses)

Theophylline: Administration of theophylline (300 mg twice daily), a substrate of CYP1A2, did not alter the steady-state pharmacokinetics of ropinirole (2 mg 3 times daily) in 12 patients with Parkinson’s disease. (notice Ropinirole, Interactions médicamenteuses)

Theophylline : A single 10 mg dose of tiagabine did not affect the pharmacokinetics of theophylline at steady state. (notice Tiagabine, Interactions médicamenteuses)