Euthyrox 50 is a prescription medication containing 50 micrograms of levothyroxine sodium per tablet. Manufactured by Merck, this medication comes in a pack of 100 tablets and is used to treat thyroid hormone deficiency and related thyroid disorders. Levothyroxine sodium is a synthetic form of the thyroid hormone thyroxine (T4). This medication requires a prescription and proper medical supervision. The dosage should be determined by a healthcare provider based on individual patient needs and regular thyroid function monitoring. Store in a cool, dry place away from direct sunlight. This is a prescription-only medication that should be taken exactly as prescribed by your doctor.