Confused about finasteride.

[JJacobs152]

Spoke to my local pharmacy, they have 5mg and 1mg finasteride. Is the 5mg fin more effective in treating the hair loss compared to the 1mg? Also, what is Proscar? Is that just the generic form of Propecia?

Secondly, what about dutasteride? Was reading about it and seems to be competitive blocker for both type I and II 5alpha-reductase, whereas finasteride only blocks 1 form of the enzyme.