The link is in German. Study is done by American professor Steven Belknap. 12000 test persons were used for this study (one of the largest scientific studies ever). Result: They didn't expect the side effects to be that devastating. Many men got full impotence years after they quit Finasteride.
https://www.welt.de/gesundheit/arti...-macht-manche-Maenner-jahrelang-impotent.html
https://www.welt.de/gesundheit/arti...-macht-manche-Maenner-jahrelang-impotent.html