I started taking Chantix about 11 days ago. So far, they really have no worked at all. The first day, I started to not get much out of a cigarette and my cravings were slightly decreased. After that, they didn't seem to work at all. Once in a while they seem to kick in for a short time, other than that, nothing. Has anyone else experienced this? Is it possible I'm just immune to Chantix?