Acupuncture treatment was found to be as effective a method as conventional drug premedication for analgesia during colonoscopic examination. In this study of 200 cases divided equally into an acupuncture and a control group, it was concluded that: 1) The overall success rate with acupuncture analgesia was similar to the results in 100 volunteers who received conventional premedication without additional complications. 2) The side effects, particularly dizziness, were less frequent in the acupuncture group than in the premedicated group.