I sometimes take Ambian. Docs don't like to prescribe it because they say its addictive. I don't take it that often. Although it takes an hour or so to kick in with me, it works pretty good once it does. Once, I took a double dose and ended up hallucinating that I was being stabbed in the legs by gypsies. I only vaguely remember the hallucination part, none of the other stuff I was doing. My family said I was running around my house, stripped down to my undershorts, and saying all sorts of crazy stuff- for at least a couple of hours. This was very scary for my family to witness, and mortifying to me because of the stuff they said I was saying and doing. I won't take two pills again at the same time.