its called the big three..
Finasteride.. (Propecia) 1mg day
Rogain Foam 1 to 2x week
ketoconazole shampoo 2% (nizoral shampoo) 1 to 2x week.. diffent days then rogain.
All three of these work off of different pathways causing synergy for the same goal..
People have amazing results with these three in regrowth of lost hair..
nizoral 1x week will do onsite dht blocking and prevent loss.