Tags: Drug.
Butorphanol (AAN BAN INN and USAN) is a morphinan-type synthetic opioid analgesic developed by Bristol-Myers. Brand name Stadol was recently discontinued by the manufacturer. It is now only available in its generic formulations manufactured by Novex Mylan Apotex and Ben Venue Laboratories. Butorphanol is most closely structurally related to levorphanol. Butorphanol is available as the tartrate salt in injectable tablet and intranasal spray formulations.
