Enhanced sedative effects w/ alcohol. Enhanced central depressive effects w/ antipsychotics (neuroleptics), hypnotics, anxiolytics/sedatives, antidepressants, narcotic analgesics, antiepileptics, anaesth & sedative antihistamines. Increased drowsiness w/ sertraline. Enhanced euphoria w/ narcotic analgesics. Enhanced activity of benzodiazepines & benzodiazepine-like agents w/ CYP450 inhibitors. Decreased pharmacodynamic effect w/ rifampicin. Prolonged elimination t
½, increased total AUC & decreased apparent oral clearance w/ ketoconazole.