"In studies, the most common side effects for people who took CHANTIX were nausea, changes in dreaming, constipation, gas and/or vomiting." (Pfizer website)
To stop smoking is always commendable but I imagine while heaving the urge to smoke does go away.
"nausea, changes in dreaming, constipation, gas and/or vomiting."
I don't know anyone who has experienced those side effects. You should take Chantix with a meal. I didn't once and it did give me a stomach ache for about 5-10 minutes. But Tylenol does that to me as well if I take it on an empty stomach.
Chantix is the real deal.