(ma soe’ pro kole)

Contents of this page:
  • Why is this medication prescribed?
  • How should this medicine be used?
  • What special precautions should I follow?
  • What should I do if I forget a dose?
  • What side effects can this medication cause?
  • What storage conditions are needed for this medicine?
  • What other information should I know?
  • Brand names
  • IMPORTANT WARNING:


    Masoprocol is no longer available in the U.S. If you are currently taking masoprocol, you should call your doctor to discuss switching to another treatment.

    Why is this medication prescribed?

    Masoprocol is used to treat sun-induced skin growths.

    This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

    How should this medicine be used?

    Masoprocol comes in cream for use on the skin. Masoprocol usually is applied every morning and evening for 28 days. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use masoprocol exactly as directed. Do not use more or less of it or use it more often than prescribed by your doctor.

    If you are using this medication on a child’s diaper area, do not place tight-fitting diapers or plastic pants on the child. They can increase the absorption of masoprocol, which can cause harmful effects.

    Thoroughly clean the infected area, allow it to dry, and then gently rub the medication in until most of it disappears. Use just enough medication to cover the affected area. You should wash your hands after applying the medication.

    What special precautions should I follow?

    Before using masoprocol,

    • tell your doctor and pharmacist if you are allergic to masoprocol, sulfites, or any other drugs.
    • tell your doctor and pharmacist what prescription and nonprescription medications you are taking, including vitamins.
    • tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while using masoprocol, call your doctor.
    • plan to avoid unnecessary or prolonged exposure to sunlight and to wear protective clothing, sunglasses, and sunscreen. Masoprocol may make your skin sensitive to sunlight.

    What should I do if I forget a dose?

    Apply the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not apply a double dose to make up for a missed one.

    What side effects can this medication cause?

    Masoprocol may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

    • burning
    • redness
    • itching
    • dry skin
    • roughness or wrinkling

    If you experience any of the following symptoms, call your doctor immediately:

    • bleeding
    • blistering
    • skin rash

    What storage conditions are needed for this medicine?

    Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

    What other information should I know?

    Keep all appointments with your doctor. Masoprocol is for external use only. Do not let masoprocol get into your eyes, nose, or mouth, and do not swallow it. Do not apply dressings, bandages, cosmetics, lotions, or other skin medications to the area being treated unless your doctor tells you.

    This medication can stain clothing and bedding. Rub the cream into your skin well and apply it 2 hours before bedtime to decrease staining.

    Do not let anyone else use your medication. Ask your pharmacist any questions you have about refilling your prescription.

    Tell your doctor if your skin condition gets worse or does not go away.

    Brand names


    • Actinex®


    Last Revised - 10/01/2006

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