i took 1/4 tab of generic 5mg finesteride for 12 days, which is a 1.25 daily dose. 6-7 days in the only change was the texture of my semen changed to a slight yellow tinge. i wasn’t alarmed as the dr who prescribed it said this would be the only change that would happen to my testicles and it would return to normal upon stopping. Exactly on day 12 I couldn’t achieve an erection, eventually after a very long time achieved a semi which was not maintainable. after a short time (i would call pre mature ejaculation) on orgasm i had bout 70% less semen on orgasm, semen was also watery and the feeling of an orgasm had 70% to 100% less feeling in the brain, I immediately realised this wasn’t for me and decided i wouldn’t take this the next day or there on. that night i had three severe twitches that immediately woke me up to 100% awake, this happened as my thoughts first turned to dream when i was trying to get to sleep. i also awoke several times throughout the night and couldn’t achieve my usual deep sleep. the next day the nightmare began of different, new and worse sides that continue to this day. so in short i would say 12 days.