Thyroid Storm Treatment Sequence

Admit suspected thyroid storm to an ICU with continuous cardiac monitoring and ventilatory support when needed.PubMed+1PubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIHPubMedApproach to the patient with thyroid storm - PMC Diagnosis is clinical; no single thyroid hormone value establishes storm. Use the Burch-Wartofsky Point Scale or Japanese Thyroid Association criteria to structure assessment, while recognizing that both rely on systemic decompensation rather than a diagnostic free T4 or T3 cutoff.BMJ+2BMJConsensus-based disease definitions for endocrine immune-related ...ScienceDirectHigh risk and low prevalence diseases: Thyroid stormScienceDirectIodine and Hyperthyroidism: A Double-Edged Sword

Obtain thyroid tests and evaluate for the precipitant, but start therapy immediately when fever, marked tachycardia or atrial arrhythmia, central nervous system dysfunction, gastrointestinal/hepatic dysfunction, heart failure, hypotension, or shock accompany thyrotoxicosis.ScienceDirect+2ScienceDirectHigh risk and low prevalence diseases: Thyroid stormPubMedApproach to the patient with thyroid storm - PMCScienceDirectThyroid Crisis - an overview Infection, acute myocardial infarction, stroke, heart failure, trauma, surgery, antithyroid-drug discontinuation, radioiodine, iodinated contrast, and pregnancy—especially labor and delivery—are recognized precipitants that require targeted treatment or avoidance of further exposure.PubMedPubMedThyroid Storm - Endotext - NCBI Bookshelf

Resuscitate with intravenous fluids, oxygen, external cooling, and acetaminophen; use cooling blankets when needed.PubMedPubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIH Avoid aspirin because displacement of thyroid hormone from binding proteins can increase free hormone levels.PubMedPubMedApproach to the patient with thyroid storm - PMC Treat agitation and hyperthermia in parallel, assess respiratory failure early, and direct hemodynamic support to the observed phenotype rather than assuming tachycardia is solely adrenergic.PubMedPubMedApproach to the patient with thyroid storm - PMC

In patients without severe heart failure, initiate a beta-blocker promptly to control tachycardia and adrenergic manifestations.ScienceDirect+1ScienceDirectHigh risk and low prevalence diseases: Thyroid stormPubMedAmiodarone and thyroid physiology, pathophysiology, diagnosis and management☆ Oral propranolol is commonly used at 10 to 40 mg three or four times daily; alternatives include metoprolol 25 to 50 mg two or three times daily or atenolol 25 to 100 mg once or twice daily.PubMedPubMedClinical Review and Update on the Management of Thyroid Storm - PMC Propranolol also reduces T4-to-T3 conversion, although beta-blockers’ principal acute benefit is control of beta-adrenergic tone.Wolters Kluwer+1Wolters KluwerThyroid Storm in Pregnancy : Bali Journal of AnesthesiologyPubMedAmiodarone and thyroid physiology, pathophysiology, diagnosis and management☆

For severe storm managed in the ICU, use titratable esmolol: a 250 to 500 mcg/kg loading dose followed by 50 to 100 mcg/kg/min is one described regimen; another review describes 50 to 100 mcg/kg/min for severe ICU-level illness.PubMed+1PubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIHPubMedClinical Review and Update on the Management of Thyroid Storm - PMC Its short duration is advantageous when blood pressure, cardiac output, or pulmonary edema may deteriorate during rate control.

Do not reflexively administer beta-blockade in severe heart failure, hypotension, or shock. The emergency-care literature specifically limits beta-blocker use to patients without severe heart failure.ScienceDirectScienceDirectHigh risk and low prevalence diseases: Thyroid storm If beta-blockers are contraindicated, diltiazem is an alternative; for reactive airway disease, atenolol or metoprolol are identified alternatives to nonselective beta-blockade.PubMedPubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIH

Give a thionamide to inhibit new thyroid hormone synthesis. One high-dose regimen is propylthiouracil (PTU) 500 to 1,000 mg loading dose, then 250 mg every 4 hours orally or intravenously, with a reported maximum of 1,600 mg/day.PubMedPubMedClinical Review and Update on the Management of Thyroid Storm - PMC Methimazole (MMI) is an alternative at 60 to 80 mg/day, with a reported maximum of 100 mg/day; intravenous MMI is not available in the United States.PubMedPubMedClinical Review and Update on the Management of Thyroid Storm - PMC

After the thionamide, administer nonradioactive iodine to rapidly inhibit hormone synthesis and release through the acute Wolff-Chaikoff effect.ScienceDirect+1ScienceDirectReview Article Iodine and Hyperthyroidism: A Double-Edged SwordScienceDirectIodine and Hyperthyroidism: A Double-Edged Sword ATA-oriented guidance recommends waiting about 1 hour after thionamide administration; another review specifies at least 30 minutes. The Japanese approach differs by allowing potassium iodide and antithyroid drug to begin concurrently.ScienceDirect+2ScienceDirectReview Article Iodine and Hyperthyroidism: A Double-Edged SwordScienceDirectIodine and Hyperthyroidism: A Double-Edged SwordPubMedAmiodarone and thyroid physiology, pathophysiology, diagnosis and management☆ In U.S. practice, preserve the thionamide-first sequence unless a protocol explicitly follows the concurrent Japanese strategy.

Use PTU or MMI with awareness of serious toxicities: agranulocytosis, hepatotoxicity, and ANCA-positive vasculitis are major adverse effects reported for both drugs.PubMedPubMedClinical Review and Update on the Management of Thyroid Storm - PMC If thionamides are contraindicated because of allergy, stabilize with beta-blockade when tolerated, hydrocortisone, cholestyramine, and iodine, then pursue thyroidectomy; therapeutic plasma exchange is a last-resort bridge when other measures fail.PubMedPubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIH

Stop iodine once clinical and thyroid-function improvement occurs; one review notes improvement generally within 24 hours after initial storm presentation.ScienceDirectScienceDirectIodine and Hyperthyroidism: A Double-Edged Sword Continue antithyroid therapy until euthyroidism, then select definitive therapy—radioiodine or thyroidectomy—according to the underlying hyperthyroid disorder and patient circumstances.PubMed+1PubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIHPubMedThyroid Storm - Endotext - NCBI Bookshelf

Administer corticosteroids to reduce peripheral thyroid hormone conversion and address possible overt or partial adrenal insufficiency.PubMedPubMedApproach to the patient with thyroid storm - PMC A reported ICU regimen is hydrocortisone 100 mg every 8 hours.PubMedPubMedApproach to the patient with thyroid storm - PMC Taper and discontinue glucocorticoids after clinical improvement, while adjusting beta-blocker therapy and titrating the thionamide.PubMedPubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIH

Add cholestyramine to interrupt enterohepatic recirculation and increase thyroid hormone excretion, particularly in severe or incompletely controlled storm.PubMed+1PubMedApproach to the patient with thyroid storm - PMCPubMedAmiodarone Therapy: Updated Practical Insights - PMC - NIH A reported regimen is 1 to 4 g orally one to four times daily; administer it 1 hour before other medications because it can reduce their absorption.PubMedPubMedClinical Review and Update on the Management of Thyroid Storm - PMC Short courses of up to 4 weeks were reported as well tolerated, but bloating, constipation, and flatulence are expected adverse effects.PubMedPubMedClinical Review and Update on the Management of Thyroid Storm - PMC

If PTU was selected during the acute phase, switch to methimazole after improvement according to the cited management review, then pursue radioiodine or thyroidectomy as definitive treatment when the patient is clinically stable.PubMedPubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIH

For ongoing deterioration despite ICU support, beta-adrenergic control when tolerated, thionamide, timed iodine, glucocorticoid, cholestyramine, and treatment of the precipitant, reassess for uncontrolled infection, cardiovascular decompensation, continued iodine exposure, or inability to absorb enteral therapy.ScienceDirect+3ScienceDirectHigh risk and low prevalence diseases: Thyroid stormPubMedAmiodarone and thyroid physiology, pathophysiology, diagnosis and management☆PubMedApproach to the patient with thyroid storm - PMCPubMedThyroid Storm - Endotext - NCBI Bookshelf Critically ill patients may require rectal formulations; intravenous MMI is described in some settings but is not available in the United States, and PTU is poorly soluble for intravenous use according to the amiodarone-focused review.PubMed+1PubMedAmiodarone and thyroid physiology, pathophysiology, diagnosis and management☆PubMedClinical Review and Update on the Management of Thyroid Storm - PMC

Consider therapeutic plasma exchange for medically refractory storm or when standard treatment is contraindicated or ineffective; it can rapidly lower circulating thyroid hormone, but available evidence frames it as rescue therapy rather than routine first-line management.PubMed+2PubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIHPubMedAmiodarone Therapy: Updated Practical Insights - PMC - NIHScienceDirect#1706162 Therapeutic Plasma Exchange and Thyroidectomy for Medical Refractory Thyroid Storm - ScienceDirect When thionamides cannot be used because of allergy, thyroidectomy after stabilization with beta-blockade when tolerated, hydrocortisone, cholestyramine, and iodine is an identified definitive pathway.PubMedPubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIH

After recovery, continue antithyroid therapy until euthyroidism and establish definitive control with radioiodine or thyroidectomy when appropriate.PubMed+1PubMedThyroid Storm - StatPearls - NCBI Bookshelf - NIHPubMedThyroid Storm - Endotext - NCBI Bookshelf Prevention includes avoiding abrupt antithyroid-drug discontinuation and ensuring euthyroidism before elective surgery and labor or delivery.PubMedPubMedThyroid Storm - Endotext - NCBI Bookshelf Thyroid storm has reported mortality up to 22%, with other reports citing 10% to 30%, reinforcing the need for early ICU-level treatment and trigger control.ScienceDirect+2ScienceDirectIodine and Hyperthyroidism: A Double-Edged SwordWolters KluwerThyroid Storm in Pregnancy : Bali Journal of AnesthesiologyPubMedAmiodarone Therapy: Updated Practical Insights - PMC - NIH