"I was prescribed 15 mg for acute insomnia and the first night I fell asleep so well, it felt like my eye lids were heavy, then the vivid dream came.  This continued for a week, and I was so groggy, had trouble coming out, but it is supposed to work better the longer you take it, and I am sorry I did not use this medicine longer.  I am going to get it again and try a full 30 days and see. Looking forward to a nights sleep.  Ambien is great, but the side effects are too much for me, but everyone reacts differently to these medicines."