Good morning: I started taking Chantix to quit smoking and have noticed a very positive effect on my CFS. I am not as tired - when I wake up in the morning, I actually WAKE UP. I have more energy. On the negative side, my fibromyalgia seems to be a little worse (but weather is changing a lot also, so might be that - will have to wait and see). Has anyone else noticed this? Any information as to why this may be? Thanks!