I'm quite confused about something regarding all that I've read about Propecia/finasteride. Many seem to say that one won't notice much until they've been on finasteride. for quite some time (some say even up to two years). However, it seems that finasteride. loses its effectiveness after anywhere from 3-5 years. So ... what's up with that? The damn drug doesn't work for two years, and loses effectiveness after 3-5? So basically, there's only ONE year of success here? Obviously, I'm slightly exaggerating, but has anyone been thinking the same thing? Any feedback would be welcomed.