bowel preparation
"I was instructed by the office of my colonoscopy/endoscopy doctor to take 2 at noon and then another 2 at 2pm on the day before the procedure.  Since the manufacturer only recommended 3 as the daily maximum dosage, I just took one at 2pm.  About an hour or so later, I started having severe stomach cramps.  The pain was so intense I was soaking in cold sweat and I blacked out!  I will never take Dulcolax ever again!"