Are you by chance getting a flexible-sigmoidoscopy? As the standard prep is 2 fleet enemas. A sigmoidoscopy goes half as far as a colonoscopy does. Sigmoidoscopies don't usually involve a sedation (unless you request one in advance). You can drive home fine. Sigmoidoscopies can take biopsies just as a colonoscopy does.
I've had a number of them and they are no big deal at all. It's a 5 minute procedure once they start. You feel a little bit of pressure as the scope injects air so they can see further. Afterwards, you pass gas to relieve the pressure.
Waaaay easier than a colonoscopy. Again, Sigmoidoscopies only see the 1st half though (your left side rextum, sigmoid colon and a peak into the transverse colon, that goes horizontal across your belly button). If you have right-side problems than a sigmoidoscopy will not go that far and a full colonoscopy would be needed in that case.
Moderator Ulcerative Colitis
John, 39, UC Proctosigmoiditis
Rx: Remicade @5mgs/kg/6wks; daily 75mgs 6MP, 4.8g generic-Lialda, and rowasa
Urgency Roused "Oh the places I've pooed from culverts to shady bathrooms" the memoirs of a UC patient. Run, don't walk, to you local bookstore...