Anesthesia: What to expect:
For surgical procedures, you will receive general anesthesia. You will be completely asleep and will not feel pain or remember anything during the procedure. You can’t feel pain. You can get this type of medicine through an IV catheter placed in your vein or as a gas or vapor that you breathe in through a mask or tube.
For endoscopy procedures like colonoscopies or EGDs, you will be monitored and receive sedation anesthesia which is a combination of medications that decrease pain and cause relaxation and amnesia. Although most patients fall asleep, you MAY feel some discomfort (similar to gas pain) and feel yourself being moved around during the procedure.
In either case, the medicine takes time to wear off. You may feel sleepy or dizzy for a few hours or even a whole day if you received general anesthesia. You must not operate a motor vehicle for 24 hours or until these effects have worn off.