J Gen Intern Med. 2006 Jun;21(6):C11-4.

Iodine-induced thyrotoxicosis after ingestion of kelp-containing tea.

Müssig K, Thamer C, Bares R, Lipp HP, Häring HU, Gallwitz B.

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Division of Endocrinology, Metabolism and Pathobiochemistry, Department of Internal Medicine, University Hospital of Tübingen, Germany. Karsten.Muessig@med.uni-tuebingen.de

Abstract

Complementary medication is en vogue and an increasing number of patients consume herbal medicine without reporting their use to physicians. We report a case of iodine-induced hyperthyroidism due to the ingestion of a kelp-containing tea. A 39-year-old woman with multinodular goiter presented with typical signs of hyperthyroidism, which was confirmed by endocrine tests. She was not exposed to iodinated radiocontrast media and did not take medications containing iodine, such as amiodarone. However, a detailed medical history revealed that she had been treated for a period of 4 weeks by a Chinese alternative practitioner with a herbal tea containing kelp because of her enlarged thyroid. The consumption of the tea was discontinued and an antithyroid drug therapy was initiated. Physicians should advise patients with underlying thyroid disease to avoid all complementary or alternative medications containing iodine.

PMID:: 16808731; [PubMed - indexed for MEDLINE]
PMCID:: PMC1924637

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