Generic name: butorphanol (injection) [ bue-TOR-fa-nol ]
Dosage form: injectable solution (1 mg/mL; 2 mg/mL)
Drug class:Narcotic analgesics
What is butorphanol?
Butorphanol is an opioid pain medication that is used to treat moderate to severe pain. It is also used as part of anesthesia for surgery, or during early labor (if childbirth is expected to be more than 4 hours away).
Butorphanol may also be used for purposes not listed in this medication guide.
Warnings
MISUSE OF OPIOID MEDICINE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH. Keep the medication in a place where others cannot get to it.
Taking opioid medicine during pregnancy may cause life-threatening withdrawal symptoms in the newborn.
Fatal side effects can occur if you use opioid medicine with alcohol, or with other drugs that cause drowsiness or slow your breathing.
Before taking this medicine
You should not use butorphanol if you are allergic to it, or if you have:
severe asthma or breathing problems; or
a stomach or bowel obstruction (including paralytic ileus).
Tell your doctor if you have ever had:
breathing problems, sleep apnea (breathing stops during sleep);
liver or kidney disease;
a head injury, brain tumor, or seizures;
heart disease, high blood pressure, recent heart attack; or
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