Varenicline
"Well , how do I start ? Ive been taking champix now for nearly 8 weeks , up until now I've felt great! Stopped smoking , a lot more energy etc until recently I keep having weird thoughts re evaluating my life , feeling paranoid , feeling depressed, crying for no reason , can't stop thinking , can't switch my brain off from thinking to even watch TV. I actually feel  so low. I have never felt like this in my life and speaking to a family member its the champix! I've stopped taking them I've got a doctors appointment on Monday I actually feel like I need to be sectioned seriously guys think twice before taking these yes they stop you from smoking, but wow the side effects are dangerous!!"