In October of last year I had to schedule my colonoscopy with a new doctor because the great doctor I had retired due to medical problems. He had always had me use Dulcolax, both bottles the night before. The new guy prescribed Suprep. I had a bad reaction and ended up in the hospital for 6 days. My pcp put in my records that I'm allergic to Suprep and that when I rescheduled that my prep would be done in the hospital. I'm so grateful for him.