Rogaine Not Proven to Work Past 48 Weeks?

I noticed on the pamphlet with my rogaine bottle that it says the medication has not been proven to work past 48 weeks. Does this mean that Rogaine doesnt work pass that many weeks or that the study was only conducted for 48 weeks? I have been using rogaine for 4 months and have seen fantastic results. Before then I was only using propecia without any results, now I use both.

I found the following statement, “hair regrowth has not been shown to last longer than 48 weeks in large clinical trials with continuous treatment with 5% minoxidil topical solution for men”. This implies that the study only went out 48 weeks. I have seen people on this medication for years and years and when and if they stop it, they lose hair. This phenomenon suggests that the Rogaine held the effect and benefit for the years it was used.