title: Variable premedication for upper gastrointestinal endoscopy.
mesh_terms: D003975:Diazepam / Q000494:pharmacology; D004329:Droperidol / Q000494:pharmacology; D004338:Drug Combinations; D005445:Flunitrazepam / Q000494:pharmacology; D005773:Gastroscopy; D006801:Humans; D008012:Lidocaine / Q000494:pharmacology; D009609:Nitrous Oxide / Q000494:pharmacology; D010100:Oxygen / Q000494:pharmacology; D011292:Premedication; D011413:Propantheline / Q000494:pharmacology
chemical_list: D004338:Drug Combinations; D011413:Propantheline; D005445:Flunitrazepam; D008012:Lidocaine; D009609:Nitrous Oxide; D004329:Droperidol; D003975:Diazepam; D010100:Oxygen