I've been on propecia for 10 years now and have maintained my hair. It's hard to say what i might look like now if i hadn't taken it. Why all of the sudden in the past few months has my hair started to thin? It's all happening so fast. Everything feels much thinner, my head itches like mad, my temples are receding, and now it's moving to the front. After so long on propecia, could my tolerance be so high the medication it's not working anymore or something? Could this just be "my time?" This sucks! 