I have never experienced shedding but I am losing hairs about 15-20 each time I shower and they are real thin on the growing end so i'm assuming they are the hairs in which the holes were closing off due to DHT and now they are being shed and the hole growing larger. How long does this last? its non stop since i started taking propecia. BTW this whole argument of impotence problems is BS. Go listen to my radio show http://www.jesusandhomi.com/ on propecia i was able to shoot a load of 11 ejaculate onto a girl. I got my guests on the show to watch the video of me doing it and confirm it.