What is "benzethidine"

n. (context pharmaceutical drug English) A particular narcotic painkiller.

Benzethidine is a 4- phenyl piperidine derivative that is related to the opioid analgesic drug pethidine (meperidine, or Demerol).

Benzethidine is not currently used in medicine and is a Class A/ Schedule I drug which is controlled under UN drug conventions. It has similar effects to other opioid derivatives, such as analgesia, sedation, nausea and respiratory depression.