Q. A 45-year-old female patient presents to the physician's clinic with complaints of fatigue, weight gain, constipation, and hair loss. On physical examination, she has diffuse goiter and dry skin. Laboratory workup reveals elevated TSH and decreased T4 levels, with positive anti-thyroid peroxidase antibodies. Thyroid ultrasound shows a heterogeneous gland consistent with Hashimoto's thyroiditis. What is the most appropriate management plan for this patient?