My mother was recently prescribed carbamezipine and we were told to have her night sedation ( zopiclone) reviewed as there could be a reaction, is this right? the chemist has told me that if she had been on zopiclone for a long time then it would be ok. however if she was on carbamezipine first and then was introduced to zopiclone there might be a problem. I dont understand how there could be a difference as its the same two drugs!