As it is used for the past 30 years, we can say that is secure. No we know how exactly it works.Why do you even say that like this drug not have been used by millions of ppl the past 30 years? We already know how its work.
do your google search .
yes with both drugs you would keep losing hair.
the problem the sensetivty that raise with time. We have treatment that dont really adress that so you would keep losing regrad the treatments.
sorry for my english..
And it not loses efficacy. The real problem is, as you said, the hair follicle sense to DHT increases with time.
I suggest to always keep using the drugs. I mean, what is a chance to a guy becomes a NW6 if he uses finasteride + minoxidil during all his life?
I think it is very rare, but will appreciate if anyone knows more details about this scenario.