I have not smoked for 19 days with the aid of champix. However I am finding the side effects hard to bear and have started cut the tablets in half. However a friend, who is also using Champix said they had been told they must never do this - something to do with the coating. Has anybody else been told this and if so what is the problem?? Can anybody advise me, I really don't want to go back to taking the full 1mg and I cannot change my prescription till next Monday.