I know long isnt exactly TOO long. but after reading and reading and reading i've found that since propecia hasnt been around that long that we may all be in for a world of hurtin if were relying on finasteride..
now this is a huge concern for me since i'm 26 and am already on propecia.
Resistance
Rogaine and Propecia are sometimes subject to "resistance." The body builds up a tolerance for these drugs. The effective dose after a period of time is no longer effective. This may happen because the body starts to produce more DHT or more of the enzyme 5-alpha reductase that converts free-floating testosterone into DHT. It has been estimated that almost 30 percent of the people who have been on Rogaine and Propecia for several years no longer respond as well as they did when they started on these drugs.
now this is a huge concern for me since i'm 26 and am already on propecia.