I quit smoking cold turkey in January. What's strange is, I didn't have the urge to smoke, I wasn't craving nicotine, not even when I was drinking. HOWEVER, I gained about 20 lbs because I still had the oral fixation, so I was constantly eating chips and crackers, and whatever else. It's all mental really, if you THINK you need a cigarette, you won't succeed. If you take those pills, you won't even have a craving, but you'll still have to control the oral fixation.