I am now paying 600 pounds per yr for nature throid and am on benefits. I need to try and switc to thyroxine. I tried before but my GP knows nothing about naturethroid so he put me on too low a dose. I have severe ME so was bedbound and very ill. I am on 2 1/2 grains. Has anyone switched and can you advise me about how to go about it...slowly? many thanks in advance for any help as I can rarely use the pc just now.