Levothyroxine, sold under brand names like Unithroid & Synthroid, treats this gland when it's underactive
[DOC] [TLE] Thyroid Hormone Replacement Drug Madness - Hypothyroid Mom [PAR] Dec 17, 2012 ... Levothyroxine T4 only medications like Synthroid fail to properly treat many ... the 
entire dried gland and its contents, including all four forms of thyroid hormone ... 
synthetic T4-only medications failed to properly treat their hypothyroidism.