The seriousness of these side effects could make the use of finasteride considerably less appealing.

Taking finasteride can cause severe side effects and lead to post-finasteride syndrome. Therefore, it is very important to be informed of the risks involved prior to starting the medication… One of the most concerning side effects is sexual dysfunction, resulting in low libido, impotence, and loss of orgasm. The seriousness of these side effects could make the use of finasteride considerably less appealing… Those suffering from the syndrome were reported to be healthy young men until they started taking the drug finasteride for hair loss.

Serious Side Effects: Post Finasteride Syndrome: DrLam Coaching Blog, July 2019