After doing the chantix for the first three weeks I had a break down and had to get off. I then went back to my old habit, did this for a week ......Didn't like the fact that the addiction won was controling me ..... so I called the doctor and was told could lower the dose to half . I only do once a day so I can sleep at night and I do not have all the side affect as I did doing the whole pill twice a day...... I have reache my third week and the chantix helps but I Still have to fight the wanting to smoke so I thought If I got on here and made some friends who were in the same boat as me it might help to not go anrd reach ....