Euthyrox 50mcg is a prescription medication containing levothyroxine sodium, used to treat thyroid hormone deficiency. Each pack contains 100 tablets manufactured by Merck. The medication helps replace or supplement thyroid hormones when the body doesn't produce enough naturally. Euthyrox contains levothyroxine sodium, a synthetic version of the natural thyroid hormone thyroxine (T4). It is used to treat hypothyroidism (underactive thyroid) and to prevent and treat goiter (enlarged thyroid gland). The medication should be taken exactly as prescribed by your healthcare provider, typically once daily on an empty stomach. Regular monitoring of thyroid hormone levels through blood tests may be required to ensure proper dosing. This is a prescription-only medication that requires careful medical supervision.