We made a shocking, but wonderful discovery last week and are passing it on in case it might help you. Florinef is an all generic POTS drug now called Fludrocortisone. My son's first prescription fill was manufactured by Barr Laboratories(now owned by TEVA), was a yellow rounded diamond shaped pill, and worked wonders. The second prescription fill was a round white pill manufactured by Impax(Global), and was about 1/3 as effective as the one made by Barr. He switched back to the Barr manufactured Fludrocortisone and it is again working wonders.