i've been taking propecia for about a dozen years now. i had, and still have, a good head of hair. i just started taking propecia when i noticed my hairline was receding a bit (around age 30) and i wanted to halt that. and that's exactly what propecia has done. my hair has remained as solid as it was a dozen years ago. i haven't experienced any negative sides other than perhaps a reduced libido for a couple of hours after i pop the tab ... so i always take the tab when i'm leaving the house each morning and heading to the office so that my sex life isn't affected at all (since i ain't banging my secretary.)