The trouble with Benzodiazapines is that most are short acting, including Ambien. The longer acting one is generic fluorazepam (sp)...it length of action is usually 7-8 hours. I have spent the last 3 months getting 4 1/2- 5 1/2 hours per nite and am about over it! I would like to see more feed back on Belsamra.... I do know its a newer class of hypnotic and works more on orexin...but I'd appreciated personal experiences with potential side effects that people have experienced.