So one of your New Year’s resolutions is to finally kick the habit and give up smoking. You see tv ads running that tell you that this pill makes giving up smoking easier. What the ad doesn’t tell you is there are some pretty nasty side effects to Chantix such as depressed mood, agitation, suicidal thinking and suicidal behavior. The side effects are serious enough that Pfizer, the drug’s manufacturer has strengthened the warning on the drug’s label. The warning asks doctors to monitor their patients for signs of those side effects. So much for a magic pill that makes it easier to stop smoking.