Stadol (generic name: Butorphanol Tartrate) is a potent analgesic agent. It is used for the relief of moderate to severe pain. Stadol is available in intramuscular or intravenous form, and most recently, as a metered-dose transnasal spray. The transnasal spray of Stadol is not an abortive or preventive drug, but rather a method of administering a pain-relieving drug for the treatment of migraine that has failed more specific anti-migraine medications.