Is it harmful to smoke marijuana prior to a colonoscopy?

before a colonoscopy, they put you out with anesthetics. studies have shown that chemicals in cannabis do in fact reduce the overall sedative properties of those anesthetics, but as far as i know that just means they need to put more in you to really fully knock you out. obviously the best idea is to stay away from the marijuana entirely for as long as possible before the procedure- you won't risk complications since everyone reacts to drugs and especially mixtures of drugs differently. Not to mention you're supposed to fast the day before you go in and the munchies are horrible to have after a day with no food. Play it safe on this one..