ATIVAN SUBLINGUAL is indicated only when the disorder has not responded to non-drug therapy, and is severe, disabling, or subjecting the individual to. Medscape - Anxiety, status epilepticus, sedation-specific dosing for Ativan, Lorazepam Intensol Initial: mg PO qhr PRN; not to exceed 10 mg/day. Benzodiazepine, Onset of Action2, Peak Onset (hrs), Half-life parent (hrs) (Ativan®). Int. (po), Rapid (sl, IV). (po), , -, 1mg. Oxazepam1 (Serax®).