Colonoscopy

I had my second nissen procedure in Aug 2012. Last month I had an endoscopy procedure which revealed the procedure has unwrapped again. Yesterday I started to prep for a colonoscopy. The prep I used was the SUPPREP Bowel Prep kit by Braintree. Within 1 hour of taking the first prep I started to experience severe abdominal pain, shortness of breath and sweating. My husband said that I passed out 2 times. He called 911 when they arrived I was barely conscience with a blood pressure of 57/45 by the time they got me to the hospital my blood pressure was so low it was undetectable. After hours of probing and prodding they were able to raise my blood pressure. The doctor diagnosed me with severe dehydration as a result of the prep. I really need to have the colonoscopy therefore I'm searching for alternative prep methods. I have had so many problems since I had the nissen fundoplication therefore I highly suggest to anyone contemplating this procedure to do a lot of research. If I had it to over I would never have had the surgery.