en Endocrinology Endocrinology case report case report <span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="color:#0000ff;"><strong><em>Background</em></strong><em>:</em></span> Thyroid storm is a rare, life-threatening condition characterized by severe clinical manifestations of thyrotoxicosis and can be precipitated by several factors. We described a thyroid storm precipitated by a long-term treatment using homeopathic medicine containing iodine.<br> <span style="color:#0000ff;"><strong><em>Case presentation:</em></strong></span> A 55-year-old Italian woman was admitted to our Sub-Intensive Care Unit with the diagnosis of congestive heart failure and thyrotoxicosis. She has been diagnosed with Graves&rsquo; disease two years before; she refused conventional therapy and in the preceding six months had been using phytotherapeutic and homeopathic medicine. We found serum and urine iodine levels consistent with severe intoxication by iodine (serum iodine: 42100 mcg/L and urinary iodine: 4223 mcg/L, respectively). After a few hours, the patient went into cardiac arrest. She was subjected to invasive ventilation, dialyzed with continuous veno-venous hemofiltration and treated with vasoactive amines.<br> <span style="color:#0000ff;"><strong><em>Conclusion</em></strong><em>:</em></span> The high level of iodemia manifested in our patient - around a thousand times greater than the normal range and itself associated with fatal outcomes - was caused by long-term homeopathic treatment. This long-term treatment has two consequences: first, iodine load-precipitated hyperthyroidism in thyroid storm, and secondly, it prevents us from treating patients with inorganic iodide.</span></span> Thyroid storm, hyperthyroidism, homeopathic treatment 371 375 http://caspjim.com/browse.php?a_code=A-10-1853-1&slc_lang=en&sid=1 Linda Daffini lindadaffini@y 100319475328460031153 100319475328460031153 No Department of Clinical and Experimental Sciences, SSD Medicina ad indirizzo Endocrino-Metabolico, University of Brescia, ASST Spedali Civili di Brescia Ilenia Pirola ilenia.pirola@gmail.com 100319475328460031154 100319475328460031154 No Department of Clinical and Experimental Sciences, SSD Medicina ad indirizzo Endocrino-Metabolico, University of Brescia, ASST Spedali Civili di Brescia Giovanni Saccà sacca.giovanni27@gmail.com 100319475328460031155 100319475328460031155 No Department of Clinical and Experimental Sciences University of Brescia-Spedali Civili di Brescia, Italy Massimo Salvetti massimo.salvetti@unibs.it 100319475328460031156 100319475328460031156 No Department of Clinical and Experimental Sciences University of Brescia-Spedali Civili di Brescia, Italy Carlo Cappelli carlo.cappelli@unibs.it 100319475328460031157 100319475328460031157 Yes Department of Clinical and Experimental Sciences, SSD Medicina ad indirizzo Endocrino-Metabolico, University of Brescia, ASST Spedali Civili di Brescia