Butorphanol is an opioid pain medication. An opioid is sometimes called a narcotic.
Butorphanol is used to treat moderate to severe pain.
Butorphanol may also be used for purposes not listed in this medication guide.
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Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
weak or shallow breathing, slow heart rate;
pounding or uneven heartbeats;
problems with urination;
tremors, numbness or tingling;
severe dizziness, confusion, feeling like you are floating;
a light-headed feeling, like you might pass out; or
dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, confusion, chest pain, shortness of breath, uneven heartbeats, seizure).
Common side effects include:
sleep problems (insomnia);
nausea, vomiting; or
Initial dose: 1 mg intravenously once. Depending on the severity of the pain, effective intravenous doses range from 0.5 to 2 mg. An initial dose of 2 mg of butorphanol intramuscularly once may be appropriate for patients who will be able to remain recumbent if drowsiness or dizziness occurs. Depending on the severity of the pain, effective intramuscular doses range from 1 to 4 mg. Alternatively, an initial dose of 1 mg of butorphanol by nasal administration (1 spray in one nostril) once. Adherence to this dose has been reported to have led to a reduced incidence of drowsiness and dizziness. If adequate pain relief is not achieved within 60 to 90 minutes, an additional 1 mg dose may be administered. Depending on the severity of the pain, an initial dose of 2 mg (1 spray in each nostril) may be appropriate in patients who will be able to remain recumbent if drowsiness or dizziness occurs. Initial doses may be repeated after 3 to 4 hours if necessary. (This includes the initial dosage sequence of 1 mg by nasal administration followed by a second 1 mg dose in 60 to 90 minutes if necessary. This sequence may be repeated 3 to 4 hours after the second dose if necessary.)