I will NEVER use Zyban again, and in fact still have half box from my last prescription. I must say it helps initially. my side effects varied the first time i tried it in 2006. (it did not work for me then). I suffered from insomnia, paranoia, all food tasted like plastic, mania, depression...
Again in 2010 I tried, it made me high as a kite, some days I would be unable to hold a conversation. This time I quit for three months, but I give that to will power more than Zyban as I had to stop.
End last year i tried it for the last time. I quit after two days after I suffered an hallucination that there was a dog in my car. almost drove into oncoming traffic.
Im on champix now for 11 days. I feel great, haven't smoked for 5 of those days and only suffer slight nausea. Ive read up n these crazy side effects it seems to be giving others... am weary yes, but it seems to be working for me...