propecia is good,but try a generic or go for proscar to save a lot of $$ ,also add nizoral shampoo,depending on how bad and how much you want to get regrowth add in %5 minoxidil
don't expect propecia to regrow you from a nW2.5 to a nw1. If the loss was recent, and you are good responder, then maybe. I would fight it with many other things too.
Without seeing pictures I can tell you, that you can decide yourself whether Propecia is enough: If you only want to maintain your hair with a slight chance of regrowth, then Propecia is enough. Maybe Nizoral Shampoo would be an useful addition. But if you want some better chance for regrowth, then you should add minoxidil to your regimen! it is up to you!