Nicotine, one of the most addictive substances you will ever know. Nicotine is the reason you continued to smoke after trying it a few times; nicotine is the reason why you have had trouble quitting in the past; and nicotine is the reason why you feel so poorly during the first days or weeks after you have quit.
In one word, CHANTIX! I have smoked for 28 yrs and never thought I could quit, but I DID! I can be around smokers all day long and it doesn't bother me at all! This is a miracle pill for me. Try it. You will be amazed!