Patients who presented for a colonoscopy with the Principal Investigator were approached to participate in the study. After obtaining consent the patients were randomized to anesthesia with propofol or control without propofol per random number tables provided by the statistician. The anesthesiologist or nurse anesthetist were asked to remove the paper with the assignment from the envelope to determine which medications to give the patient. Pre-op, intra-op, and post-op data were collected by registered nurses blinded to the anesthetic. The day one follow-up phone call was made by the resident who was blinded to the anesthetic. Data were collected in the pre-op, intra-op, and post-op areas by the researchers who were blinded to the medications used.