A suitable dose in most cases is 10 mg a day, divided into two doses 12 hours apart or one capsule of 5 mg twice daily (b.d.) morning and evening. At this dosage the patient is free from drowsiness and his reaction time and concentration ability are not affected. In severe anxiety states the dosage may be increased to 20 mg a day divided into 2 capsules of 5 mg b.d. mornings and evenings.