I started taking Zyban about two months ago for
smoking cessation. At first I had very little side effects - in fact, I felt fantastic and ceased smoking within the first week. Three weeks into the treatment, I became emotionally very unstable, crying for no reason, feelings of worthlessness - almost an induced depression with insomnia, very vivid dreams, severe join pains etc. I coped well with those until I went out one night, had a few drinks and a total blackout followed.