I was on the same boat as your v/f but tell him not to worry.
I am on a med called "propecica" (spelling??).
For me: first month it slowed down my hair loss at a pretty rapid rate.
2nd month is stopped my hair falling out all togeather! my mates couldnt belive there eyes my hair was soooo stong! they couldnt even pull it out! on my 3rd month i noticed little tiny hairs growing back ***** was amazing for me and i was over the moon.
Now it will stop it from falling out thats for sure but im one of the lucky 5% or that it help grow back, i also live in australia so the name might be differnt over there