An interesting study , shows that the effects are reversible after discontinuing the drugs , and somehow “mild” side effects , note that people were taking 5 mg finasteride not even 1mg which is the recommended for hair loss
https://academic.oup.com/jcem/article/92/5/1659/2598215
https://academic.oup.com/jcem/article/92/5/1659/2598215