Most probably the results will dissapear in 6-12 months...
But, let's hope another substance CB-03-01 which is supposed to be better than finasteride will be released in a couple of years.
And i know doctors who take finasteride for 19 years, kept the hair and have no problem.
But let's hope we won't need to take it that long, maybe some better product for inhibiting DHT will appear soon.