Already exists (finasteride), only problem is that it castrates you chemicallym
About 2% of finasteride users experience these side effects, and they are reversible after discontinuation.
Yep. Not everybody but enough to warrant vigilant monitoring and titration.
For everyone struggling with hair loss but concerned about side effects of Fin. Look into topical fin. It produces higher concentrations of the medication in the scalp and lower systemic concentration. Not perfect, but better.