Finasteride Side Effects
What should I watch for?
Do not donate blood while you are taking this medicine. This will prevent giving this medicine to a pregnant female through a blood transfusion. Ask your doctor or health care professional when it is safe to donate blood after you stop taking this medicine.
Women who are pregnant or may get pregnant must not handle broken or crushed finasteride tablets. The active ingredient could harm the unborn baby. If a pregnant woman comes into contact with broken or crushed tablets she should check with her doctor or health care professional. Exposure to whole tablets is not expected to cause harm as long as they are not swallowed.
Contact your doctor or health care professional if your symptoms do not start to get better. You may need to take this medicine for 6 to 12 months to get the best results.
This medicine can interfere with PSA laboratory tests for prostate cancer. If you are scheduled to have a lab test for prostate cancer, tell your doctor or health care professional that you are taking this medicine.
This medicine may increase your risk of getting some cancers, like breast cancer. Talk with your doctor.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
dizziness, faintness, or lightheadedness when getting up from a lying or sitting position
Bloating or swelling of the face, arms, hands, lower legs, or feet
breast enlargement and tenderness
hives or welts
rapid weight gain
redness of the skin
swelling of the lips and face
tingling of the hands or feet
unusual weight gain or loss
Incidence not known
Clear or bloody discharge from the nipple
dimpling of the breast skin
lump in the breast or under the arm
persistent crusting or scaling of the nipple
redness or swelling of the breast
sore on the skin of the breast that does not heal
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Decreased interest in sexual intercourse
inability to have or keep an erection
loss in sexual ability, desire, drive, or performance
Less common or rare
Abdominal or stomach pain
decreased amount of semen
Incidence not known
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.