What Zyban does is lessen the effects of nicotine withdrawal. Nicotine withdrawal can be so uncomfortable that it becomes the one reason why those who wish to stop smoking can not. That is where Zyban comes in, it makes the smoking cessation more bearable. It is interesting the way it was found out that Zyban can help smokers stop the habit. It is fair to say that it was discovered by mistake. Join discussion...