Furethidine[2][3][4] is a 4-phenylpiperidine derivative that is related to the clinically used opioid analgesic drug pethidine (meperidine),[5] but with around 25x higher potency.

[6] According to another source, Furethidine is 500/30 = 16.7 x the potency of pethidine (table VII).

It has similar effects to other opioid derivatives, such as analgesia, sedation, nausea and respiratory depression.

[9] In the United States it is a Schedule I Narcotic controlled substance with the ACSCN of 9626.

This analgesic-related article is a stub.