
1) Synthetic opioid
Found on
https://www.crosswordclues.com/clue/butorphanol

Butorphanol is listed under the Single Convention on Narcotic Drugs 1961 and in the United States is a Schedule IV Narcotic controlled substance with a DEA ACSCN of 9720; being in Schedule IV it is not subject to annual aggregate manufacturing quotas. The free base conversion ratio of the hydrochloride is 0.69 ==Mechanism of action== Butorphanol e...
Found on
http://en.wikipedia.org/wiki/Butorphanol

<chemical> A synthetic morphinan analgesic with narcotic antagonist action. It is used in the management of severe pain. ... Pharmacological action: analgesics, opioid, antitussive agents, narcotic antagonists, narcotics. ... Chemical name: Morphinan-3,14-diol, 17-(cyclobutylmethyl)- ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

(bu-tor´fә-nol) a synthetic opioid used as an analgesic and an adjunct to anesthesia in the form of the tartrate salt.
Found on
http://www.encyclo.co.uk/local/21001

a narcotic analgesic, CHNO, administered by injection to treat moderate to severe pain.
Found on
https://www.infoplease.com/dictionary/butorphanol
No exact match found.