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Levothroid (Levothyroxine Sodium) - Description

 


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DESCRIPTION

LEVOTHROID® (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 NaO4× H2O, 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
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

Page last updated: 2006-05-09

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