Does anesthesia show up on a drug test as a benzo?my son had an upper gi & 6 hrs later had a drug test and it came back positive for benzos.

He probably received: ...a Versed or Valium-type sedation. Of course, if his sedation did not include such agents, he may be procuring them from another source given his positive drug screen as reported.

Maybe: Sometimes the initial stage of anesthesia will include using benzodiazepines to prepare the patient quickly for insertion of the breathing tube.The inhaled "gas" is then used for the balance of the procedure. A check with the hospital records should document any drug used.