Examples include the cholesterol-reducing agent atorvastatin, the antibiotics rifabutin and clarithromycin, the asthma treatment theophylline, the antidepressants desipramine, trazodone and bupropion (also used for smoking cessation), the anticonvulsants carbamazepine, phenobarbital and phenytoin, the proton pump inhibitors omeprazole and esomeprazole and sedative agents (e. g. midazolam administered by injection).