Brand Name Thyroid Hormones:

•  Synthroid – synthetic T4 only
•  Levothroid – synthetic T4 only
•  Levoxyl – synthetic T4 only
•  Unithroid – synthetic T4 only
•  Cytomel – synthetic T3 only
•  Thyrolar –synthetic fixed ratio of T3 and T4
•  Armour – bio-identical fixed ratio of T3 and T4 (T4:T3 = 4.22:1)
•  Westhroid – bio-identical fixed ratio of T3 and T4
•  Nature-Throid – bio-identical fixed ratio of T3 and T4

Generic Thyroid Hormones:

•  Levothyroxine – synthetic T4 only
•  L-Thyroxine – synthetic T4 only
•  Liothyronine – synthetic T3 only
•  Liotrix – synthetic fixed ratio T3/T4 combination
•  Desiccated Thyroid – bio-identical T3/T4 combination

Synthetic Thyroxine (T4) Hormones:

•  Synthroid – Brand Name
•  Levothroid – Brand Name
•  Levoxyl – Brand Name
•  Levothyroxine – Generic
•  L-Thyroxine – Generic

Synthetic Triiodothyronine (T3) Hormones:

•  Cytomel – Brand Name
•  Liothyronine – Generic Synthetic T3 and T4 Combination:
•  Thyrolar – Brand Name
•  Liotrix – Generic

Bio-Identical T3 and T4 Combinations:

•  Armour – Brand Name
•  Westhroid – Brand Name
•  Nature-Throid – Brand Name
•  Desiccated Thyroid – Generic