Noun
butorphanol (uncountable)
(pharmacology) A synthetic analgesic and antitussive opioid drug (trademark Stadol) administered in the form of its tartrate C21H29NO2·C4H6O6 as a nasal spray or by injection especially for the relief of pain.
Butorphanol can also be derived from thebaine and is scheduled separately from butorphanol derived by other processes. Source: Internet
Occasional uses of Butorphanol also can be helpful during moments of heightened pain. Source: Internet