"Rogaine loses its effectiveness in 1 or 2 years?".
John
In most people, minoxidil keeps working indefinitly , at least as far as
we've got information (roughtly 10-15 years ). About a third of the time,
it stops working by 2-5 years or so. Again, this seems to be more
progression of the balding process rather than drug tolerance per se. In
common with a lot of other types of drug tolerance, minoxidil tolerance can
be mostly prevented by using (e.g. ) another drug such as an antiandrogen
along with minoxidil.
Peter H. Proctor, PhD, MD
(713) 960-1616
So you continue to use minox and after 4 years or so in some people,
those follicles that were helped by minox stop growing hair. Not because
they have become tolerant to the drug, but because damage to the
follicles still continues from DHT, so eventually, those follicles are
too damaged to produce hair even with help from minox.
This would give the appearance that people become tolerant to minox.
-Alan