I've had an awful experience that I must share and find out if anyone else has gone through it. I currently take Lexapro 10mg, a mild antidepressant, and it's wonderful for me. A little over a month ago, I requested a prescription for Chantix to quit smoking. Even though I'd heard lots of negative things about the side effects, I thought it was worth trying. After 4 weeks of taking it, I did notice that my mood was being affected, so I decided to stop taking it.