1 Answer

The Mayo Clinic says that zopiclone can cause chest tightness, difficulty breathing, wheezing, aggressiveness, changes in your behavior, severe drowsiness, aggressiveness and a skin rash. It can cause wheezing, memory problems, tachycardia (fast heartbeat), vomiting, shakiness, increased saliva production, convulsions and nervousness. Zopiclone can cause irritability, diaphoresis (sweating), restlessness and muscle cramps.. Zopiclone may cause bad breath, a bitter taste in your mouth and even your tongue may have a coated appearance. Do not suddenly discontinue zopiclone without your doctor's supervision. It may lead to such withdrawal side effects as nausea, vomiting, anxiety, nervousness, irritability, convulsions and tremors. Call your doctor immediately when these side effects occur. 

http://www.livestrong.com/article/67686-zopiclone-side-effects/