Seeing a lot of Champix quitters on the forum and being one myself I would like to explain what I have learned with the use of Champix:
"Everything is a choice" (Anonymous). We can escape from the tyranny of our bad habits using any method that works. We have free will. The upside down mornings or the orderly routines, the complaints or the compliments, these are all choices we make, and if we want to change our lives, we need to first look at our choices.
Early in my quit on those hellish sleepless nights I learned:
“When you puff on a cigarette, nicotine travels through your lungs, into your bloodstream, and to your brain. It attaches to receptors, which release a brain-reward chemical called dopamine – you get a hit of pleasure .
When you take Champix (varenicline), it attaches to many of these receptors. The result is: you get continual release of that pleasure chemical dopamine. It’s not quite the same intensity as a cigarette but it’s spread out over the whole day
Common side effects include nausea, headaches, abnormal dreams, difficulty sleeping, increased appetite, altered taste sensation, dry mouth, dizziness, tiredness and sleepiness, vomiting, constipation, diarrhoea, feeling bloated, indigestion and flatulence.”
During my 26 smoke free months I have seen people complaining of the above side effects using other methods than Champix and I would like to say it is the normal quit symptoms because quitting is not easy except when you do it the Mark Twain way: ”Thousands of times”
I have chosen to supplement with herbal supplements and vitamins and followed Zig Zaglar’s words when he said “"A great attitude becomes a great mood, which becomes a great day, which becomes a great year, which becomes a great life" The moral of the story: Focus on the good and it will lead to more goodness.!!!
Stopping with champix
Champix
Champix does not work for me 
Champix
Depression and champix 
