Levothyroxine /L-thyroxine (Synthroid
, Levoxyl, Unithroid, etc.)
Propylthiouracil / PTU
Natural thyroid (Armour, Naturethroid, Bio-tech)
Thyrotropin alfa (Thyrogen)
Time-released T3, compounded
It is best to stick with the same medication. However, when changing, its best to give it time to work and make sure test are done because levels might change. Once you are regulated on the new med.