For Insomnia: "I have been taking lorazepam for many years I started with the highest dose my dr began to lower it until I was taking just half of mg. Mar 10, - Each Ativan (lorazepam) tablet, to be taken orally, contains mg, 1 mg, or 2 mg of lorazepam. The inactive ingredients present are lactose. May 7, - The extended release alprazolam or Xanax XR is mg – 1 mg twice a day. Lorazepam is also used for anxiety disorder as well as insomnia.