(Chantix) to help them stop you need to be aware of what has happened to my son. He started taking Champix about 3 weeks ago. He complained of bizarre dreams and poor sleep. He also indicated that he felt increased anxiety and I could see that he was shaking. I was not overly concerned as he had not indicated that it was that much of a problem and he had in fact stopped smoking for more than 2 weeks. Last night he came home from a friend's place and started throwing stuff around his bedroom, when my older son went in to see what was going on he lunged at him and tried to strangle him. When I went up to intervene he turned his anger on me, saying some very offensive things and being very hostile and threatening. This is very out of character for my son, he would die to protect me and would never normally behave this way. I thought it was because he had been drinking but still this is out of character even if he is drinking, he told me this morning he had not had that much to drink. he said that he could hear what he was saying and could not stop him self, he felt very out of control, he also told me that he had attempted to hang himself with his belt but the belt broke. I thank God that he is still with me.

I got on the internet and read a number of different articles and blogs and found that this was experienced by many other people.
I took him to the doctor and he also concurred that this was caused by the champix and it can have this effect on some people.
If you know anyone who decides to take this medication it is imperative that someone is looking out for them.