Thyroid Disorders — Practice
A 28-year-old woman with hyperthyroidism is found on a peripheral blood smear showing markedly reduced neutrophils with relative lymphocytosis three weeks after starting an antithyroid drug; she now has fever and a sore throat. Which drug is the most likely cause and what is the immediate step?
ALevothyroxine; switch to liothyronine
BPropranolol; reduce the dose
CCarbimazole; stop the drug and start broad-spectrum antibiotics
DPotassium iodide; continue and observe