Zileuton interactions

Fluvoxamine, a known strong inhibitor of CYP1A2, has been shown to increase mean alosetron plasma concentrations (AUC) approximately 6-fold and prolong the half-life by approximately 3-fold [see Drug Interactions ( 7.1 )] . (Alosetron label, Contraindications)

Strong CYP1A2 inhibitors : Avoid concomitant use. (Duloxetine label, Drug interactions)

Reduce the erlotinib dosage when co-administering with a strong CYP3A4 inhibitor or a combined CYP3A4 and CYP1A2 inhibitor if co-administration is unavoidable [see Dosage and Administration (2.4) ]. (Erlotinib label, Drug interactions)

Other drugs that are relatively less potent inhibitors of CYP 3A4 should also be avoided, in view of the risks: e.g., zileuton, fluvoxamine. (Pimozide label, Contraindications)

Use of fluvoxamine or other strong CYP1A2 inhibitors should be discontinued prior to administration of ESBRIET and avoided during ESBRIET treatment. (Pirfenidone label, Drug interactions)

Strong CYP1A2 Inhibitors: Avoid concomitant use of strong CYP1A2 inhibitors. (Pomalidomide label, Drug interactions)

Fluvoxamine (strong CYP1A2 inhibitor): Increases AUC for ramelteon and should not be used in combination. (Ramelteon label, Contraindications)

Strong CYP1A2 inhibitors (e.g., fluvoxamine): Avoid use of HETLIOZ in combination with strong CYP1A2 inhibitors because of increased exposure ( 7.1 , 12.3 ) (Tasimelteon label, Drug interactions)

Zanaflex is contraindicated in patients taking strong CYP1A2 inhibitors [see Drug Interactions ( 7.1 )] . with a history of hypersensitivity to tizanidine or the ingredients in Zanaflex. (Tizanidine label, Contraindications)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Use Zileuton Extended-Release Tablets with caution in patients who consume substantial quantities of alcohol and/or have a history of liver disease. (Zileuton label, Warnings and precautions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Drugs that inhibit CYP1A2 (e.g., fluvoxamine, ciprofloxacin) could increase the exposure of AGRYLIN. (Anagrelide label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Effect of Other Drugs on Bendamustine Hydrochloride Injection CYP1A2 Inhibitors The coadministration of Bendamustine Hydrochloride Injection with CYP1A2 inhibitors may increase bendamustine plasma concentrations and may result in increased incidence of adverse reactions with Bendamustine Hydrochloride Injection [see Clinical Pharmacology (12.3) ] . (Bendamustine label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

• Concomitant use of Strong CYP1A2 Inhibitors: Reduce CLOZARIL dose to one-third when coadministered with strong CYP1A2 inhibitors (e.g., fluvoxamine, ciprofloxacin, enoxacin). (Clozapine label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Tizanidine (CYP1A2 Substrate) Although not studied clinically, famotidine is considered a weak CYP1A2 inhibitor and may lead to substantial increases in blood concentrations of tizanidine, a CYP1A2 substrate. (Famotidine label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Tizanidine (CYP1A2 Substrate) Clinical Impact Famotidine is considered a weak CYP1A2 inhibitor and may lead to substantial increases in blood concentrations of tizanidine, a CYP1A2 substrate. (Ibuprofen and famotidine label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

…Weak CYP3A4 inhibitors (such as alprazolam, amiodarone, amlodipine, atorvastatin, bicalutamide, cilostazol, cimetidine, cyclosporine, fluoxetine, fluvoxamine, ginkgo, goldenseal, isoniazid, lapatinib, nilotinib, pazopanib, ranitidine, ranolazine, ticagrelor, zileuton) can increase lomitapide exposure approximately 2-fold [see Clinical Pharmacology (12.3) ] . (Lomitapide label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Inhibitors of CYP1A2 Fluvoxamine: Fluvoxamine, a CYP1A2 inhibitor, decreases the clearance of olanzapine. (Olanzapine label, Drug interactions)

Inhibitors of CYP1A2 — Fluvoxamine decreases the clearance of olanzapine. (Olanzapine and fluoxetine label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

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. (Primaquine label, Drug interactions)

Propranolol Co-administration of zileuton immediate-release tablets and propranolol results in a significant increase in propranolol concentrations. (Zileuton label, Drug interactions)

Ciprofloxacin or Other CYP1A2 Inhibitors Rasagiline plasma concentrations may increase up to 2 fold in patients using concomitant ciprofloxacin and other CYP1A2 inhibitors. (Rasagiline label, Warnings and precautions)

Strong to moderate CYP1A2 inhibitors: Co-administration may increase TIGLUTIK-associated adverse reactions ( 7.1 ) (Riluzole label, Drug interactions)

Therefore, if therapy with a drug known to be a potent inducer or inhibitor of CYP1A2 is stopped or started during treatment with ropinirole, adjustment of the dose of ropinirole may be required. (Ropinirole label, Drug interactions)

In vivo, the plasma clearance of ropivacaine was reduced by 70% during coadministration of fluvoxamine (25 mg bid for 2 days), a selective and potent CYP1A2 inhibitor. (Ropivacaine label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases theophylline levels. (Zileuton label, Drug interactions)

Zileuton increases propranolol levels and beta-blocker activity. (Zileuton label, Drug interactions)

Zileuton increases warfarin levels. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

Strong CYP1A2 Inhibitors (e.g., Fluvoxamine) SAPHRIS is metabolized by CYP1A2. (Asenapine label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

An open-label, nonrandomized clinical study examined the immune responsiveness to varicella vaccine in 243 asthma patients 12 months to 8 years of age who were treated with budesonide inhalation suspension 0.25 mg to 1 mg daily (n=151) or non-corticosteroid asthma therapy (n=92) (i.e., beta 2 -agonists, leukotriene receptor antagonists, cromones). (Budesonide label, Warnings and precautions)

An open-label, nonrandomized clinical study examined the immune responsiveness to varicella vaccine in 243 asthma patients 12 months to 8 years of age who were treated with budesonide inhalation suspension 0.25 mg to 1 mg daily (n=151) or noncorticosteroid asthma therapy (n=92) (i.e., beta 2 -agonists, leukotriene receptor antagonists, cromones). (Budesonide and formoterol label, Warnings and precautions)

…voriconazole ) , cimetidine, ciprofloxacin, clarithromycin, dalfopristin, danazol, dantrolene, delavirdine, diltiazem, erythromycin, fluoxetine, fluvoxamine, grapefruit juice, ibuprofen, isoniazid, loratadine, nefazodone, niacinamide, nicotinamide, olanzapine, omeprazole, oxybutynin, quinine, quinupristin, ticlopidine, troleandomycin, valproate, verapamil, zileuton. (Carbamazepine label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

Drug-drug interaction studies in healthy subjects have been conducted with zileuton immediate-release tablets and digoxin, phenytoin, sulfasalazine, and naproxen. (Zileuton label, Drug interactions)

Less potent inhibitors include saquinavir, nefazodone, fluconazole, grapefruit juice, fluoxetine, fluvoxamine, zileuton, and clotrimazole. (Dihydroergotamine label, Warnings)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

Effect s of HALAVEN on Other Drugs Eribulin does not inhibit CYP1A2, CYP2C9, CYP2C19, CYP2D6, CYP2E1 or CYP3A4 enzymes or induce CYP1A2, CYP2C9, CYP2C19 or CYP3A4 enzymes at relevant clinical concentrations. (Eribulin label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

(E) In vitro studies of CYP enzymes, UGTA enzymes and OATP1B1 transporter In vitro studies have shown that gemfibrozil is an inhibitor of CYP1A2, CYP2C8, CYP2C9, CYP2C19, OATP1B1, and UDP-glucuronosyltransferase (UGT) 1A1 and 1A3 (see WARNINGS ). (Gemfibrozil label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

Drug-drug interaction studies in healthy subjects have been conducted with zileuton immediate-release tablets and digoxin, phenytoin, sulfasalazine, and naproxen. (Zileuton label, Drug interactions)

Drug-drug interaction studies in healthy subjects have been conducted with zileuton immediate-release tablets and digoxin, phenytoin, sulfasalazine, and naproxen. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

Drug-drug interaction studies in healthy subjects have been conducted with zileuton immediate-release tablets and digoxin, phenytoin, sulfasalazine, and naproxen. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

CYP1A2 Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP1A2 inhibitor. (Ritlecitinib label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

Drug-drug interaction studies in healthy subjects have been conducted with zileuton immediate-release tablets and digoxin, phenytoin, sulfasalazine, and naproxen. (Zileuton label, Drug interactions)

Drug-drug interaction studies in healthy subjects have been conducted with zileuton immediate-release tablets and digoxin, phenytoin, sulfasalazine, and naproxen. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

CYP1A2 Venlafaxine did not inhibit CYP1A2 in vitro . (Venlafaxine label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

However, no formal drug-drug interaction studies between zileuton and CYP3A4 inhibitors, such as ketaconazole, have been conducted. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (Zileuton label, Drug interactions)