You want sound advice?
Firstly propecia can really turn you impotent PERMANENTLY.
It can reduce and maybe regrow a little hair.
Dun expect much effect.
There are alot of cases of the drug suddenly lost effect and what ever you grew suddenly withered and dropped off.
It's not about the money, it's the impotency which is a big issue.
IMO it's not worth it.
Secondly, for people who are losing hair on the crown.
Can use Rogaine.
It works only on the top crown but not on the residing hairline.
At the moment, i can't find any solution to residing hairline rather than hair transplant.
I've a friend who did this and it works the best.
He has successfully got back his Aaron Kwok look.
1) Hair transplant from back to frontal. (From Thailand; They are the pros and they are 1/4 price of SG)
2) Use Rogaine on the top.
MOST IMPORTANTLY, maintain it. With right shampoo and maybe rogaine.
Whether you maintain it now before it has effect, or whether you already did something which works and you should protect it.
If you have a son, i will advise you to advise him to use the right shampoo with immediate effect to avoid future woes like you who is reading this now.
There's two shampoo that are highly recommended to be effective which i don't know why it's seldomly mentioned. Anyway find a good shampoo and use Rogaine.