Been on it since it was available - '97/98 1mg/ed and since about 2005 I've been on 1.25mg/ed (1/4 proscar). I started minoxidil about 10 years ago, and overall I held pretty much steady all those years with just an ever so slight, gradual thinning in the hairline but the crown was solid. Probably held a Norwood 2 or 2.5 up until about a year ago when I've lost more in the hairline and crown that I did in those 20+ years combined (which is why I'm back on HairLossTalk.com lol) so my guess is that I might be at the end of the line with finasteride efficacy after 22+ years.