Nov 13, - Comparison of Ativan (Lorazepam) vs Xanax (Alprazolam): medical of one dose make it quite effective against the treatment of insomnia. Xanax (alprazolam) effectively treats occasional or short-term anxiety and panic attacks. Compare Ativan vs. Xanax. Head-to-head comparisons of medication uses, side effects, ratings, and more. Difficulty sleeping Taking more than the prescribed dose; Taking Ativan (lorazepam) for longer than 4 weeks; History of. Feb 8, - I think that Ativan compared per mg of Zanex makes me much less . Xanax doesn't make me drowsy but Ativan helps me go to sleep in the What is the difference between Lorazepam and.