Quite a few people on another forum seem to think that RU loses its effectiveness after 2-3 years. I don't know if this is true but apparently many people used it in eary 2000 and almost everyone stopped after 3 years or less because it had stopped working. Is there any long term studies that prove or disprove this? I was thinking of buying some sometime in the future but 3 years maintenance isn't brilliant especially compared to finasteride or dutasteride.