butorphanol tartrate /byo̅o̅tôr″fənôl/ , an agonist/antagonist opioid of the phenanthrene family. ▪ INDICATIONS: It is administered parentally for surgical premedication, as an analgesic component of balanced anesthesia, for prompt relief of moderate to severe pain associated with surgical procedures, and as a nasal spray for the relief of migraine pain. ▪ CONTRAINDICATIONS: Butorphanol tartrate is not given to patients known to be sensitive to phenanthrenes or to persons dependent on opioids because it may provoke withdrawal symptoms. ▪ ADVERSE EFFECTS: Toxicity may result from the use of butorphanol with other opioids.
