The recommended dose of Ativan (Lorazepam) is 2 to 6 mg/day in divided doses. Patients with anxiety are recommended to take 2 to 3 mg per day.  For insomnia caused by temporary situational stress, a dose of 2 to 4 mg is given before bedtime. Elderly patients are recommended doses of 1 to 2 mg/day with adjustments as needed.