You may request no medication for the exam; however, you may experience some discomfort or cramping due to air being put into your stomach or intestine. Most patients receive medication so that they can fall asleep shortly after receiving it. Your physician or a Certified Nurse Anesthetist (CRNA)will give you intravenous medication to make you feel relaxed. Almost all people fall asleep prior to starting the procedure and do not remember the procedure when they awaken. The physician will put air into your colon (for colonoscopy) or stomach (upper endoscopy) to help visualize the lining and this sometimes causes a cramping or bloated sensation. Passing this air during and following the exam will relieve any discomfort.