I’m aware that fin isn’t as effective on thickening hairs at the hairline, but is it effective at halting further recession, as it is at stopping general thinning?
Finasteride (Propecia) may halt further hairline recession, but hairline recession is usually not reversed with this drug. It’s also usually not a permanent phenomenon, so over time you can expect more hairline recession even if it stops the recession initially.
In other words, even if you take Propecia every day without missing a step and have good results, you could eventually start seeing the loss start again. It’s not a hair loss cure, though some patients have been on the medication for over a decade while still seeing good results.