decrease in your blood Prostate Specific Antigen (PSA) levels. PROPECIA can affect a blood test called PSA (Prostate-Specific Antigen) for the screening of prostate cancer. If you have a PSA test done you should tell your healthcare provider that you are taking PROPECIA because PROPECIA decreases PSA levels. Changes in PSA levels will need to be evaluated by your healthcare provider. Any increase in follow-up PSA levels from their lowest point may signal the presence of prostate cancer and should be evaluated, even if the test results are still within the normal range for men not taking PROPECIA. You should also tell your healthcare provider if you have not been taking PROPECIA as prescribed because this may affect the PSA test results. For more information, talk to your healthcare provider.
There may be an increased risk of a more serious form of prostate cancer in men taking finasteride at 5 times the dose of PROPECIA.
The most common side effects of PROPECIA include:
decrease in sex drive
trouble getting or keeping an erection
a decrease in the amount of semen
The following have been reported in general use with PROPECIA:
breast tenderness and enlargement. Tell your healthcare provider about any changes in your breasts such as lumps, pain or nipple discharge.
depression;
suicidal thoughts;
decrease in sex drive that continued after stopping the medication;
allergic reactions including rash, itching, hives and swelling of the lips, tongue, throat, and face;
problems with ejaculation that continued after stopping medication;
testicular pain;
blood in semen;
difficulty in achieving an erection that continued after stopping the medication;
male infertility and/or poor quality of semen.
in rare cases, male breast cancer.
Tell your healthcare provider if you have any side effect that bothers you or that does not go away.
These are not all the possible side effects of PROPECIA. For more information, ask your healthcare provider or pharmacist.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.