Butorphanol

Butorphanol While butorphanol can be made from thebaine, it is usually manufactured synthetically. It was initially available in injectable formulations for human (Stadol®) and veterinary (Torbugesic® and Torbutrol®) use. Butorphanol  is a morphinan-type synthetic opioid analgesic developed by Bristol-Myers. This nasal spray is used to relieve moderate to severe pain. Butorphanol is in a...