Euthyrox 25 mcg is a medication classified as a synthetic thyroid hormone replacement. It works by supplementing or replacing the natural thyroid hormones in the body. This helps regulate energy levels and metabolism. Euthyrox is commonly prescribed for hypothyroidism, a condition where the thyroid gland does not produce enough hormones. By providing the necessary thyroid hormones, Euthyrox helps alleviate symptoms such as fatigue, weight gain, and sensitivity to cold. It is crucial to follow the dosage instructions provided by your healthcare provider to ensure optimal thyroid hormone levels and overall well-being.