Just an opinion, but I think there is probably something behind the complaints that Finasteride "quits working" after 5-7 years.
Yeah, I know it doesn't happen to all users.
Yeah, I know some guys on Finasteride are still steady or improving after 10+ years.
Yeah, I know some of the complaints are probably guys slipping below their pre-Finasteride baseline, and calling that a "sudden failure."
No, I'm not stupid enough to think that falling below baseline means the drug has stopped helping at all.
But I've heard too many smart perceptive guys report variations of the same thing (that the ongoing loss picks up speed after 5-7 years). I doubt they were all imagining it.
Why would it be happening? I dunno. But perhaps it's no coincident that 5-7 years is around the length of one complete healthy hair cycle. Just guessing.
Again, I know there is a lot of individual variation with Finasteride.