Dear , This is Dr. S. Tomar from healthcaremagic.com s medical team and I ll be your medical adviser for this question. First of all thank you for sharing your concern with us and showing trust on us. Quitting zopiclone cold turkey can lead to withdrawl symptoms like: -fatigue - muscle cramps -panic attacks - sweating - flushing - lightheadedness People who are addicted to it needs professional help from expert substance abuse treatment providers . Support group therapy sessions and substitute medicines are main parts to come out of it with minimum withdrawal symptoms. I would suggest you to consult with some rehabilitation center for further help. This is my initial response and discussion is open until you have any query or need further clarification. I wish you good health . Thank you for your question and feel free to contact further for any question . sincerely, Dr. Shardendu Tomar