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(metaproterenol sulfate) Aerosol, Metered


Alupent (metaproterenol sulfate USP) Inhalation Aerosol is a bronchodilator administered by oral inhalation. The Alupent Inhalation Aerosol containing 75 mg of metaproterenol sulfate as micronized powder is sufficient medication for 100 inhalations. The Alupent (metaproterenol sulfate) Inhalation Aerosol containing 150 mg of metaproterenol sulfate as micronized powder is sufficient medication for 200 inhalations. Each metered dose delivers through the mouthpiece 0.65 mg of metaproterenol sulfate (each ml contains 15 mg). The inert ingredients are dichlorodifluoromethane, dichlorotetrafluoroethane and trichloromonofluoromethane as propellants, and sorbitan trioleate. Alupent (metaproterenol sulfate) , 1-(3,5-dihydroxyphenyl)-2-isopropylaminoethanol sulfate, is a white, crystalline, racemic mixture of two optically active isomers. It has the following chemical structure:

Alupent (metaproterenol sulfate) structural formula illustration

What are the possible side effects of metaproterenol (Alupent, Metaprel)?

If you experience any of the following serious side effects, stop taking metaproterenol and seek emergency medical attention or contact your doctor immediately:

  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives); or
  • chest pains or an irregular heart beat.

Other, less serious side effects may be more likely to occur. Continue to take metaproterenol and talk to your doctor if you experience

  • headache, dizziness, lightheadedness, or insomnia;
  • tremor or...

Read All Potential Side Effects and See Pictures of Alupent »

Last reviewed on RxList: 5/1/2009
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.

Allergies & Asthma

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