Treatment for thyroid dysfunction varies depending on whether the patient has hypothyroidism or hyperthyroidism. Hypothyroidism is typically treated with levothyroxine, a synthetic form of thyroid hormone. Hyperthyroidism can be managed with antithyroid medications like methimazole or propylthiouracil, radioactive iodine therapy, or surgery in severe cases. Regular monitoring and dose adjustments are essential to maintain optimal thyroid function.