5-Alpha Reductase and Propecia

If Propecia reduces DHT by blocking the 5-alpha reductase enzyme, does stopping Propecia mean that the normal production of 5AR will take place once again or are the blocked 5AR enzymes gone forever (I’ve heard the latter on message boards like propeciahelp.com).

The block from the enzyme 5-alpha reductase is not a complete one (I believe I read it was about 80% with Propecia) — and it is always there. When you stop Propecia, the enzyme continues to do what it always does and is not “gone forever”, as you read on those message boards.