Finasteride (Propecia) is a steroid reductase inhibitor.

Use Finasteride (Propecia) as directed by your doctor.

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; nipple discharge; testicular pain.

This is not a complete list of all side effects that may occur. If you have questions or need medical advice about side effects, contact your doctor or health care provider.

No specific interactions with Finasteride (Propecia) are known at this time.

Ask your health care provider if Finasteride (Propecia) 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.

Contact 1-800-222-1222 your local poison control center or emergency room immediately.

Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

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 a narrowing or blockage in the urinary tract, prostate cancer, or trouble urinating

if you have a history of abnormal liver function tests or liver problems

Do not double doses to make up for a missed dose.

Finasteride (Propecia) is an androgen hormone inhibitor used to Treating certain types of male pattern hair loss in men only.

Ask your doctor or pharmacist for more information.

Store away from heat and direct light.

Infrequently, Finasteride (Propecia) may cause decreased sexual desire or ability. These effects usually decrease in men who continue to take Propecia . If they continue or become bothersome, check with your doctor.

Propecia may increase the risk of certain birth defects, including abnormal formation of genitalia in male fetuses.

Finasteride (Propecia) may interfere with certain lab tests, including prostate-specific antigen tests. Be sure your doctor and lab personnel know you are taking Finasteride (Propecia).

If you have any questions about Finasteride (Propecia), please talk with your doctor, pharmacist, or other health care provider.