I know one woman who has been on
almost every T4-only, T3/T4 combo, and Armour
at one time or another. It seems each worked for her for a while and then stiopped working and made her sick. Finally, with the complete support of her endo, who she loves, she got off all meds briefly, then started on T3-only. That's been working for her fo several months now, and she feels good. However, her endo has recently told her he wants to try to introduce some T4 again.