i was told by a hair doctor that dutasteride is a no go. in fact, the company that created it and has been testing it has decided not to continue with the drug. seems it is not effective for hair control. i was told that the best option is to take a 5mg proscar and break into 4 pieces. more than that won't make a bit of differences. you only require 8/10ths of a mg for effective measures, even when taking test.