A patient reports fatigue, weight loss, and dry skin. The pr…

A patient reports fatigue, weight loss, and dry skin. The primary care nurse practitioner (NP) orders thyroid function tests. The patient’s thyroid stimulating hormone (TSH) is 40 microunits/mL, and T4 is 0.1 ng/mL. The NP should refer the patient to an endocrinologist and prescribe: