Enhanced sedation or resp & CV depression w/ CNS depressants eg, alcohol, antidepressants, antihistamines, antipsychotic, general anesth or analgesics; cisapride. Aspirin shortens time to induce anesth. Reduced clearance w/ fentanyl, cimetidine. May diminish analgesic effects of sufentanil. Increased peak plasma conc w/ erythromycin & blood conc w/ ciprofloxacin. Decreased t
½ w/ rifampicin. Increased intensity & duration of action w/ ketoconazole & itraconazole. Avoid concomitant use w/ HIV-PIs. Peak plasma conc is doubled & prolonged elimination t
½ w/ diltiazem & verapamil. Synergistic interaction between thiopental; methohexital & propofol. Reduced conc of halothane for anesth. Reversed by benzodiazepines antagonist flumezenil. Clozapine, roxithromycin.