Finasteride, even at doses as low as those used in hair loss, can cause long-lasting and significant adverse effects.

Finasteride can have negative sexual effects (low desire or worse erections are very common). In fact, there has been information for years that there is a post-finasteride syndrome that occurs in young men who start taking the drug to stop hair loss (erectile problems persist despite stopping the drug). Therefore, taking finasteride, even at doses as low as those used in hair loss, can cause long-lasting and significant adverse effects.

—Alimente: A Crazy Use for a Popular Hair Loss Drug: Is It Good for Lowering Cholesterol? January 3, 2024