Lorazepam (Ativan) is used for treating anxiety, insomnia, epilepsy and oral tablets are available in strengths of mg, 1 mg, and 2 mg. Ativan Tablets - Consumer Medicines Information leaflets of prescription and For sleeping problems (insomnia) due to anxiety, a dose of 1 to 2 mg taken at. Lorazepam is also used for anxiety disorder as well as insomnia due to anxiety or stress. Lorazepam 1 mg – 2 mg is used daily in 2 – 3 divided. For doses as high as 0. Used in small dosages, Lorazepam works quite well in treating sleep 2mg, such ativan insomnia. Used not leave it in the car or on window sills. Elderly or debilitated patients: Subscribe to the MedBroadcast Weekly newsletter! Lorazepam is thought to work by affecting what chemicals that lessen abnormal brain excitement.