Common Finasteride Side Effects

There are a few possible Finasteride side effects you might experience when you take the medication to cure hair loss. These side effects may include anything from dizziness, nausea, diarrhea, upset stomach, or headaches. But, most people will experience the same or less common side effects of using this medication to treat male pattern baldness. Below is some information on the possible Finasteride side effect that some people may experience.


Sexual dysfunction

This is one of the most common of the Finasteride side effects and is usually associated with those who take the medication for sexual problems. The problem with sexual performance while taking finasteride is that the hormone that causes the hair to fall starts to work on the nearby bloodstream instead of the penis itself. This results in a decrease in blood flow to the penis. Since it is an effect of the hormone, this can also affect sexual desire, and the ability to achieve orgasm.


Prostate cancer

As previously mentioned, the main effect of Finasteride is that it causes a decrease in the amount of testosterone that the body produces, which is one of the main hormones that make up a man’s prostate. The decreased production of testosterone is linked to an increased risk of prostate cancer. While this side effect is not a common one among those who take finasteride, it is still worth noting. It is important to note that men who have prostate cancer should consult with their doctors before starting any kind of natural treatment for this condition. Finasteride is not known to help in treating prostate cancer.


Breast tenderness

Another of the common Finasteride side effects is that of breast tenderness or breast enlargement. Since breast tenderness is often associated with menopause, women who are taking finasteride are often concerned about the effect this might have on their ability to breastfeed. Finasteride is generally safe for women who are nursing but its effects on breast tissue are unknown. There are very few studies that have looked at breast tenderness patients taking finasteride.



A side effect seen in certain patients taking finasteride is dizziness. Dizziness is caused by the potassium loss from the bloodstream when the user is suffering from a potassium deficiency, as is the case with patients taking certain medications, like beta-blockers. While this is considered a side effect, it is one of the newer ones that has been proven to be related to the use of finasteride. The study found that patients who were suffering from prostate cancer that had discontinued their use of finasteride had lower levels of potassium in their blood than those who continued to take the medication. However, other studies showed that patients whose prostate cancer was still active did not have any significant reduction in potassium levels in their blood.



One of the most common finasteride side effects is nausea. While this may seem like an odd symptom to be dealing with, the study found only one incident of nausea in patients who continued to take finasteride. While this particular side effect is not considered dangerous, it is important to remember that nausea is commonly associated with high-grade prostate cancer treatment and patients should speak with their doctor to confirm that they do not have nausea related to finasteride.

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