Rifampin Drug Interactions and Monitoring Rifampin Drug Interactions of Major Clinical Significance: Oral anticoagulants, Oral contraceptives, Cyclosporine, Digitoxin, Glucocorticoids, Methadone hydrochloride, Midazolam or triazolam, Phenytoin, Quinidine, Theophylline, Verapamil Rifampin Drug Interactions: ß-Adrenergic agents, Chloramphenicol, Clarithromycin, Dapsone, Diazepam, Digoxin (oral), Diltiazem, Disopyramide, Doxycycline, Haloperidol, Losartan potassium, Nifedipine, Nortriptyline hydrochloride, Pefloxacin, Tacrolimus, Tocainide #Rifampin #Drug #Interactions #pharmacology #management #monitoring