A 42-year-old woman presents with fatigue, weight gain, cold intolerance and constipation. Examination reveals dry skin and bradycardia. TSH is 14 mIU/L (reference 0.4-4.0) and free T4 is low. What is the most appropriate initial management?ACommence levothyroxine at a full replacement dose based on body weightBObserve and repeat thyroid function tests in 6 monthsCStart carbimazoleDOrder thyroid ultrasound and delay treatmentEStart propranolol alone for symptom controlCheck my answer