Okay, the first two weeks of the drug were absolute living hell. The first three days I felt like I was on speed, then after that I got depressed and then turned into a total bitch for like a week. But, it makes cigarettes taste like crap after about 4-5 days on it. I had planned to quit after taking it a week but I didn't feel ready yet so I waited another week.
It does have myriad of side effects. Mine were mainly digestive issues...bloating, acid reflux, indigestion, mild nausea but only if I didn't eat before taking it, etc. It also affected my dreams, but I thought it was cool. I rarely remember if I dreamed and on the Chantix I would have this crazy vivid dreams

I think alot of my emotional disorder was a combination of just side effects from the Chantix and not getting enough nicotine, because now I feel fine. So fine, I've decided to quit taking the Chantix. I really just don't want to smoke anymore and have no desire to. It did help me to quit, but I don't think I need it to stay quit. Plus, any drug that list a side effect as serious as heart attack or stroke, I'd rather not take.