January 2026 in “Journal of Dermatological Treatment” Oral finasteride may cause more sexual side effects than expected, possibly due to negative publicity and reporting bias.
January 2002 in “European Urology Supplements” Finasteride can cause sexual side effects like decreased libido and erectile dysfunction.
October 2021 in “European urology open science” August 2025 in “The Journal of Sexual Medicine” Finasteride, dutasteride, and silodosin have the highest risk for causing sexual dysfunction.
January 2016 in “Archivio italiano di urologia, andrologia” The document concludes that the risk of sexual side effects from 5-alpha-reductase inhibitors is low and often temporary, but more research is needed on potential permanent effects.