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    • 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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