This video,, can also be seen at propecia (finasteride) side effects drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication. This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.Propecia was approved by the U.S. Food and Drug Administration in 1997, and at that time Merck noted that a few men reported sexual side effects during clinical trials of the drug.MED researcher: battling baldness can cause sexual dysfunction. Merck and sold generically as Proscar and Propecia) and dutasteride (made by. possible sexual side effects from their products, and Merck says finasteride.It is impossible for your healthcare provider to know beforehand whether you will develop sexual side effects while taking Propecia.Also, if a person does develop sexual side effects, such as impotence or a decrease in libido, it is difficult to know whether these problems are actually caused by another condition or Propecia itself.High doses are needed to achieve results, so men should not take cimetidine to treat their hair loss due to possible feminizing effects, including adverse sexual side effects. a 1 mg version with.A 32-year-old man is concerned about permanent erectile dysfunction and impotency as a possible side effect of Propecia (finasteride). He wants to know if it is really possible to incur these.Finasteride, sold under the brand name Propecia, is one of the most. Some claim the drug's potential side-effects last even after they stop taking it. Hair loss can be caused when high levels of the male sex hormone.Propecia will allow you to keep the hair you already have, well into your.. "the group informed about the sexual adverse effects of finasteride.propecia is a FDA approved medication to resuce hair loss, however it does have many sexual side effects. We always have out clients read about the side effects and make sure they understand the consequences before we prescribe them this medication.She says a rare side effect of the hair-loss drug finasteride, aka Propecia. studies have linked finasteride to persistent sexual side effects and.