Thyro-Tabs

DRUG DESCRIPTION

THYRO-TABSŪ (levothyroxine sodium tablets, USP) contains synthetic crystalline L-3,3,5,5-tetraiodothyronine sodium salt [levothyroxine (T4) sodium]. Synthetic T4 is identical to that produced in the human thyroid gland. Levothyroxine (T4) sodium has an empirical formula of C15H10I4N NaO4xH2O, molecular weight of 798.86 g/mol (anhydrous), and structural formula as shown:

Inactive Ingredients. Microcrystalline cellulose, calcium phosphate dibasic, povidone and magnesium stearate. The following are the coloring additives per tablet strength.

Strength (mcg)
Color additive(s)
25
FD&C Yellow No. 6 Aluminum Lake
50
None
75
FD&C Blue No. 2 Aluminum Lake, FD&C Red No. 40 Aluminum Lake
88
FD&C Yellow No. 6 Aluminum Lake, FD&C Blue No. 1 Aluminum Lake, D&C Yellow No. 10 Aluminum Lake
100
FD&C Yellow No. 6 Aluminum Lake, D&C Yellow No. 10 Aluminum Lake
112
D&C Red No. 27 Aluminum Lake, D&C Red No. 30 Aluminum Lake
125
FD&C Blue No. 1 Aluminum Lake, FD&C Red No. 40 Aluminum Lake, FD&C Yellow No. 6 Aluminum Lake
137
FD&C Blue No. 1 Aluminum Lake
150
FD&C Blue No. 2 Aluminum Lake
175
FD&C Blue No. 1 Aluminum Lake, D&C Red No. 30 Aluminum Lake, D&C Red No. 27 Aluminum Lake
200
FD&C Red No. 40 Aluminum Lake
300
FD&C Yellow No. 6 Aluminum Lake, FD&C Blue No. 1 Aluminum Lake, D&C Yellow No. 10 Aluminum Lake


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