Adult : PO Sedation 30-120 mg/day in 2-3 divided doses. Hypnotic 100-320 mg. Do not admin for >2 wk for the treatment of insomnia. Status epilepticus; Emergency management of acute seizures 100-300 mg/day at bedtime. IM Pre-op sedation As phenobarbital Na: 100-200 mg 60-90 min pre-op. IM/IV Hypnotic 100-320 mg. Do not admin for >2 wk for the treatment of insomnia. Status epilepticus; Emergency management of acute seizures As phenobarbital Na: 200-600 mg.