Oct 10, - Your dose of lorazepam should be taken just before you go to bed at night. Make sure you will be able to have an uninterrupted sleep of 7 to 8. Mar 10, - Learn about Ativan (Lorazepam) may treat, uses, dosage, side For insomnia due to anxiety or transient situational stress, a single daily dose. Mar 17, - Lorazepam is also used to treat insomnia, epilepsy, irritable bowel syndrome (IBS), agitation caused by alcohol withdrawal, and nausea and.