Starting New Years Day, Medicare is removing Armour thyroid extract for hypothyroid from its pharmaceutical formulary of approved medications. I received the notice today. My HMO won't cover the cost of my Armour thyroid now. What makes it ridiculousness is that I called some pharmacies about the approved thyroid and was told that there's a shortage of some of them-back ordered. It appears the new new thyroid hormone replacements have T 4 in them and are lacking T 3. I've been reading articles and comments on how many people don't seem to have the ability to break T 4 down into T 3. These people just don't feel well-still gain weight-lose hair.