PC,
I wanted to add that I did stop smoking for six months on Chantix. I did not complete the course and had to take a few personal days from work in order to deal with the side effects, but I always realized in the back of my mind that everything going on inside of me, including the thoughts of suicide and cat murder, was caused by Chantix. It took absolute self control not to act on the paranoia, agression and depression. The ordeal left me exhausted. Chantix not only took away my joy of smoking, it took away my joy in living.
I know that some on this thread have poo-pooed the side effcts of Chantix saying that the symptoms are probably just nicotine withdrawal. However, when I stopped smoking cold turkey several years prior, although having withdrawal symptoms, they were mild and can not be compared to the symptoms I experienced on Chantix.
Although I am sure Chantix does much good, never ever forget that it can cause terror, hostility, agression, paranoia, depression and suicide.
I care for you and wish you well in quitting.
Robyn