The National Institutes of Health This is the best place to go to get medical information. From the home page of NIH, enter the word "hypnosis" in the search box in the upper right hand corner and you will get a list of hundreds of scientific articles about the effectiveness of hypnotism.
This fact sheet provides basic information about mind-body medicine, including relaxation, hypnosis, visual imagery, meditation, yoga, biofeedback, etc. nccam.nih.gov/health/whatiscam/mind-body/mindbody.htm - 34k