- allopurinol, alprazolam, amitriptyline, atorvastatin, bupropion, carbamazepine, cerivastatin, chlorpheniramine, chlorpromazine, chlorzoxazone, cimetidine, clarithromycin, clofibrate, clorazepate, clozapine, codeine, dapsone, desipramine, diazepam, diltiazem, disopyramide, encainide, erythromycin, estazolam, estrogens and progesterones, fluoxetine, flurazepam, fluvastatin, glucocorticoids, hypericum perforatum (St. John's wort), imipramine, isoniazid, itraconazole, ketoconazole, labetalol, lamotrigine, lidocaine, lovastatin, mexiletine, morphine, naloxone, nefazodone, nifedipine, nortriptyline, opioids, oxazepam, pentazocine, phenobarbital, phenytoin, promethazine, propofol, propranolol and other beta blockers, sildenafil, simvastatin, temazepam, T3 (thyroid hormone), warfarin, valproic acid, and zolpidem.