August 29, 2016
Recommended Topic Related To:


"Consumers and health care professionals will soon find updated labeling for extended-release and long-acting opioid pain relievers to help ensure their safe and appropriate use.

In addition to requiring new labeling on these prescript"...



(butorphanol tartrate) Injection, USP

(butorphanol tartrate) Nasal Spray


Butorphanol tartrate is a synthetically derived opioid agonist-antagonist analgesic of the phenanthrene series. The chemical name is (-)-17-(cyclobutylmethyl) morphinan-3, 14-diol [S- (R*,R*)] - 2,3 - dihydroxybutanedioate (1:1) (salt). The molecular formula is C21H29NO2,C4H6O6 , which corresponds to a molecular weight of 477.55 and the following structural formula:

Butorphanol tartrate is a white crystalline substance. The dose is expressed as the tartrate salt. One milligram of the salt is equivalent to 0.68 mg of the free base. The n-octanol/aqueous buffer partition coefficient of butorphanol is 180:1 at pH 7.5.

STADOL (butorphanol tartrate) Injection, USP, is a sterile, parenteral, aqueous solution of butorphanol tartrate for intravenous or intramuscular administration. In addition to 1 or 2 mg of butorphanol tartrate, each mL of solution contains 3.3 mg of citric acid, 6.4 mg sodium citrate, and 6.4 mg sodium chloride, and 0.1 mg benzethonium chloride (in multiple dose vial only) as a preservative.

STADOL NS (butorphanol tartrate) Nasal Spray is an aqueous solution of butorphanol tartrate for administration as a metered spray to the nasal mucosa. Each bottle of STADOL NS contains 2.5 mL of a 10 mg/mL solution of butorphanol tartrate with sodium chloride, citric acid, and benzethonium chloride in purified water with sodium hydroxide and/or hydrochloric acid added to adjust the pH to 5.0. The pump reservoir must be fully primed (see PATIENT INSTRUCTIONS) prior to initial use. After initial priming each metered spray delivers an average of 1.0 mg of butorphanol tartrate and the 2.5-mL bottle will deliver an average of 14-15 doses of STADOL (butorphanol tartrate) NS. If not used for 48 hours or longer, the unit must be reprimed (see PATIENT INSTRUCTIONS). With intermittent use requiring repriming before each dose, the 2.5-mL bottle will deliver an average of 8-10 doses of STADOL (butorphanol tartrate) NS depending on how much repriming is necessary.

What are the possible side effects of butorphanol (Stadol)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Tell your caregivers at once if you have any of these serious side effects:

  • pounding, or uneven heartbeats;
  • shallow breathing, slow heartbeat;
  • cold, clammy skin;
  • problems with urination;
  • tremors;
  • confusion, feeling like you are floating;
  • feeling like you might pass out; or
  • dangerously high blood pressure (severe headache, blurred vision, ringing in your...

Read All Potential Side Effects and See Pictures of Stadol »

Last reviewed on RxList: 6/2/2008
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Chronic Pain/Back Pain

Find tips and advances in treatment.