Is it normal to pass blood during colonoscopy preparation?

This question was asked in Bonita Springs, Florida on 05/29/2012.
The colonoscopy preparation instructions were take 4 dulcolax at 11 am then a bottle of miralax with 2 bottles of Gatorade. The pharmacist told me to get the overnight dulcolax so my husband took the 4 pills before bed. At 3 am he awoke with bad cramps, he has since passed several blood clots and says his stomach really hurts and he has the chills. Is this normal?

Doctors Answers (3)

David Pound, M.D.
Answered on: 6/1/2012 1

Sometimes the prep for a colonoscopy can make external and/or internal hemorrhoids bleed due to the frequent stools. The prep can also cause some cramping with the bowel movement.

Harsha Vittal, M.D.
Answered on: 5/31/2012

It is unusual and should be discussed with your gastroenterologist.

David Myles Nolan
Answered on: 5/30/2012

That is not normal. I would encourage you to undergo the colonoscopy as this will possibly evaluate the source of the bleeding. Definitely inform your gastroenterologist asap.