Smoking Cessation
"Four weeks on Chantix worked.  I stopped taking the drug a week ago and still don&#039;t have the desire to smoke.  I definitely experienced nausea and have had the worst sleep of my life over the last month.  I had a hard time falling asleep and an even harder time staying asleep.  Another side effect has been weight gain.  Over the course of the last 18 years I&#039;ve gained 25 pounds, and 15 of that 25 has been in the last 4 weeks!  Lastly, I (and those around me) have noticed that I&#039;m extremely irritable and aggressive.  In my first couple of days off the meds I felt depression like I never have and was even more irritable.  The weight gain still continues."