i started taking Champix 2 weeks ago, it definitely works. but i had a blackout while on this drug and drinking alcohol.. i was unaware of the side affects that it can have. due to 1. know warnings on packet 2. no warning from my doctor(even after telling her that i drink on weekends)3. partly my fault, by being complacent to the situation... after what i experienced, this drug can be extremely dangerous. and should be made know to the penchant..