Yes, I've switch between zopiclone and zolpidem (ambien) for the last 6 years. They are both types of hypnotics, and have similar effects to valium and that group of meds. Zopiclone is VERY addictive and should only be used short term. Unfortunately I was left on it for too long and now I'm completely dependant on it. Did you're doctor explain any of this to you? If you are looking for more info on it try a google search. I would really encourage you not to use it long term and only to use it when its really needed. Also are you in therapy? Or is there somewhere you can explore the reasons why you're having trouble sleeping? Sorry I'm not on here very often so I don't really know anyone.