The 20.8% that experienced no change still maintained the hair that they had before treatment. They just didn't get regrowth. Being able to maintain is a big success in itself. Regrowth is an added bonus. Basically, in this study, 99.4% either got maintenance or regrowth on dutasteride after four years. And in the finasteride study that Itsjustsimon quoted, 87% either maintained or regrew after 10 years. These studies demonstrate the incredible effectiveness of finasteride and dutasteride as hair loss treatments.
I don't know why there are people on here doubting the effectiveness of finasteride and dutasteride. The evidence that these drugs work for hair loss is so overwhelming that it doesn't make sense to me why it is even being questioned on here.
Maintenence isn’t a big success. If someone has diffuse thinning prior to treatment, but maintain what they currently have, I don’t see that as a success. I see that as a waste of time.
In the finasteride study, those 87% just had to reach the baseline. I looked at the images provided, and those results were horrendous. But, it has to be classed as an improvement since they spouted hairs which have the same density as the hairs on my arm.
If someone went on finasteride and experienced great results within the first five years. After that, it was a case of maintenence and then the medication started to lose its effectiveness and thinning began. After ten years, the medication is continuously losing its effectiveness but you still have more hair than in the baseline. After all, the main discussion is long-term use however I can’t credit those statistics since the situation I explained could be included within that.