Levoxyl®
(levothyroxine sodium tablets, USP)
DESCRIPTION
—LEVOXYL® (levothyroxine sodium tablets, USP) contain 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, croscarmellose sodium 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. 1 Aluminum Lake, D&C Red No. 30 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 | FD&C Yellow No. 6 Aluminum Lake, FD&C Red No. 40 Aluminum Lake, D&C Red No. 30 Aluminum Lake |
| 125 | FD&C Red No. 40 Aluminum Lake, D&C Yellow No. 10 Aluminum Lake |
| 137 | FD&C Blue No. 1 Aluminum Lake |
| 150 | FD&C Blue No. 1 Aluminum Lake, D&C Red No. 30 Aluminum Lake |
| 175 | FD&C Blue No. 1 Aluminum Lake, D&C Yellow No. 10 Aluminum Lake |
| 200 | D&C Red No. 30 Aluminum Lake, D&C Yellow No. 10 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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