anesthesia
"I had a colonoscopy a few days ago. Was extremely nervous.  Went to sleep so quickly.  Woke up 1.5 hours later in recovery to be told my BP dropped significantly low and be sure to tell that if I ever had to have surgery/procedure again.  I was a complete chatterbox for the first 30 minutes after waking but felt wonderful.   I did question why a 15 minute procedure kept me "out" for 1.5 hours and would not have known that my BP dropped if they didn't tell me. I can't say don't use this but I won't endorse it either."