I have tried it 3 times. Not knowing what was happening to me. The first time there was some mild mood changes (so I thought). The second time, much more but I put it aside thinking I was just having a bad patch and everyone else was having the problem. The third has had me close to death 3 times. My life has become a pit of dispair and in ruins. I have taken this drug from two drs and complained about side effects after the fact. Neither one told me about the side effects of this drug nor did they relate it to taking chantix.My problems always came up AFTER I stopped taking the drug. Has anyone else gone thru this and what helps?