According to the American College of Chest Physicians (2007), hypnosis was more than twice as effective as quitting "cold turkey," and over three times as effective as nicotine replacement therapy.
Also according to the American College of Chest Physicians (2007), former hospital patients who were motivated to quit had a 50% success rate using hypnosis to quit smoking after only one hypnosis session with recorded sessions for follow-up, while only 15.78% of those using nicotine replacement quit successfully.
Those engaging in a behavior modification program, nicotine replacement, or a Zyban medication approach alone to quit smoking have a success rate of about 13%