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Generic Name: finasteride (fin-AS-ter-ide)
Brand Name: Proscar

Proscar is used for:

Treating urinary problems caused by an enlarged prostate gland (benign prostatic hyperplasia [BPH]). It is also used to lower the risk of needing surgery to treat BPH. It may be used with another medicine (doxazosin) to lower the risk of worsening BPH. It may also be used for other conditions as determined by your doctor.

Proscar is a type of steroid reductase inhibitor. It works by reducing the amount of the hormone dihydrotestosterone (DHT) in the body. This makes the prostate gland smaller, which helps to relieve urinary problems.

Do NOT use Proscar if:

  • you are allergic to any ingredient in Proscar
  • you are or may be pregnant

Contact your doctor or health care provider right away if any of these apply to you.

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Before using Proscar:

Some medical conditions may interact with Proscar. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have narrowing or a blockage in the urinary tract, prostate cancer, nerve or muscle problems of the bladder, a bladder infection, severe trouble urinating, or if you are unable to urinate
  • if you have a history of increased serum prostate-specific antigen (PSA) levels, abnormal liver function tests, or liver problems

Some MEDICINES MAY INTERACT with Proscar. However, no specific interactions with Proscar are known at this time.

Ask your health care provider if Proscar may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Proscar:

Use Proscar as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • An extra patient leaflet is available with Proscar. Talk to your pharmacist if you have questions about this information.
  • Take Proscar by mouth with or without food.
  • Continue to take Proscar even if you feel well. Do not miss any doses.
  • Taking Proscar at the same time each day will help you remember to take it.
  • If you miss a dose of Proscar, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Proscar.

Important safety information:

  • Proscar may cause dizziness. This effect may be worse if you take it with alcohol or certain medicines. Use Proscar with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
  • Proscar may cause dizziness, light-headedness, or fainting; alcohol, hot weather, exercise, or fever may increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of any of these effects.
  • Proscar may cause decreased sexual desire or ability (eg, decrease in sex drive, problems with ejaculation, difficulty in achieving an erection). If this occurs, it may continue after you stop the medicine. If you develop decreased sexual desire or ability that continues or becomes bothersome, check with your doctor. If this effect continues after you stop Proscar, contact your doctor.
  • Decreased fertility has been reported in some men taking Proscar. Discuss any questions or concerns with your doctor.
  • Proscar may increase the risk of certain birth defects, including abnormal formation of genitalia in male fetuses. Proscar is coated to prevent contact with finasteride while handling undamaged tablets. The coating is not effective if the tablets are damaged, broken, or crushed. Women who are pregnant or may be pregnant should avoid contact with damaged, broken, or crushed tablets. If contact occurs, tell your doctor at once.
  • Proscar may increase the risk of a certain type of prostate cancer. Discuss any questions or concerns with your doctor.
  • Rarely, there have been cases of male breast cancer reported in patients taking Proscar. Discuss any questions or concerns with your doctor. Tell your doctor right away if you develop breast changes, such as lumps, pain, or nipple discharge.
  • Check with your doctor about whether you should use a barrier method of birth control (eg, condoms) if you have sex with a pregnant woman while taking Proscar.
  • Do not donate blood while you take Proscar and for at least 1 month after your last dose of Proscar to prevent exposure through a blood transfusion to a pregnant woman.
  • Proscar may interfere with certain lab tests, including PSA tests. Be sure your doctor and lab personnel know you are taking Proscar.
  • Proscar should not be used in CHILDREN; safety and effectiveness in children have not been confirmed.
  • PREGNANCY AND BREAST-FEEDING: Proscar may cause harm to the fetus. It is not known if Proscar is found in breast milk. Proscar is not approved for use in women.

Possible side effects of Proscar:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Decreased sexual desire or ability.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); breast enlargement, lumps, pain, or tenderness; depression; nipple discharge; testicular pain.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately.

Proper storage of Proscar:

Store Proscar at room temperature, below 86 degrees F (30 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep Proscar out of the reach of children and away from pets.

General information:

  • If you have any questions about Proscar, please talk with your doctor, pharmacist, or other health care provider.
  • Proscar is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take Proscar or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about Proscar. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Proscar. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using Proscar.

Issue Date: April 2, 2014
Database Edition 14.2.1.001
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

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