What constitutes the initial coordinated treatment for thyroid storm?

• A. Iodine therapy first, then PTU
• B. PTU with beta-blocker, IV fluids, cooling; iodide after PTU; steroids
• C. Beta-blocker alone
• D. Methimazole alone

Answer: (B)

In thyroid storm, the goal is a rapid, coordinated attack on the overactive thyroid and its systemic effects. The most effective plan combines stopping new thyroid hormone production, blocking the effects of existing hormone, and supporting the patient’s fluids, temperature, and stress responses.

Starting with propylthiouracil is essential because it both inhibits thyroid hormone synthesis and reduces peripheral conversion of T4 to the more active T3. A beta-blocker is added to blunt the severe adrenergic symptoms (tachycardia, tremor, agitation) and to decrease oxygen demand. Giving IV fluids and cooling addresses dehydration and extreme hyperthermia, which drive many complications in thyroid storm. After the antithyroid drug has begun blocking synthesis, iodide is given to rapidly inhibit release of thyroid hormones from the gland. Glucocorticoids are added to further reduce T4 to T3 conversion and to cover potential adrenal insufficiency during a critical illness.

This sequence—PTU first, then iodide, with beta-blockade, aggressive supportive care, and steroids—follows the rationale that suppressing synthesis must precede iodide to prevent any paradoxical increase in hormone production, and it targets both the hormonal excess and the body's supportive needs. Other options omit one or more of these critical elements or the proper sequencing, making them less effective for the storm.