What are the possible side effects of Propecia?
- Decrease in blood prostate specific antigen (PSA) levels. Propecia can affect a blood test called PSA (prostate specific antigen) for prostate cancer screening. If you have a PSA test done you should inform your health care provider that you are taking propecia because propecia decreases PSA levels. Changes in PSA levels will need to be evaluated by your health care provider. Any increase in PSA levels from follow-up from its lowest point may indicate the presence of prostate cancer and should be evaluated even if the test results are still within the normal range for men who do not take propecia. You should also tell your doctor if you have not been taking propecia as prescribed because this may affect the results of the PSA test. For more information, talk to your health care 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:
- Decreased sexual desire
- Problems 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 discharge from your nipples;
- Decreased sexual desire 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;
- Difficulty getting an erection that continued after stopping the medication;
- Male infertility and / or poor semen quality.
- In rare cases, male breast cancer.
These are not all possible side effects of propecia. For more information, consult your healthcare provider or pharmacist.