Intravenous sedatives used for endoscopic procedures include Propofol and/or Versed (similar to valium), and Fentanyl. These medications provide amnesia and pain relief. You are breathing on your own – it is not general anesthesia. After the sedation wears off you may still be sleepy. This is why all endoscopy centers require that a responsible adult drive you home.
If you are taking DAILY narcotic pain medications, regular use of relaxers such as xanax, valium, ativan, librium, or sleeping pills (such as ambient, dalmane or restoril) you will need propofol and this may require advanced notice to set up. Similar concerns exist for HIV positive patients.