I started taking Chantix two weeks ago and the first week I felt fine. Once I started taking 2mg a day I was feeling dizzy and nausea all the time and headaches. I went down to 1 1/2mg a day and I would take half a pill after eating and that was okay. This week I have changed my dose again to only 1mg a day (half in the morning and half at night). I still feel dizzy, but my stomach is better. I haven't smoked for a week!!! I want to finish my starter pack because it was expensive. I am hoping that after a month I will have a good foundation to continue without the Chantix.