| Summary: | Cholestyramine, a bile acid sequestrant, has been used primarily for lipid-lowering purposes but has also shown potential in managing hyperthyroidism and thyrotoxicosis. The objective of this review is to assess the efficacy, safety, and clinical indications of cholestyramine in the treatment of hyperthyroidism, thyrotoxicosis, and associated conditions, particularly when conventional therapies fail or are contraindicated. A literature review of clinical guidelines, original research articles, and case reports was conducted, focusing on studies that explored cholestyramine’s use in the treatment of hyperthyroidism, thyrotoxicosis, and levothyroxine overdose. Cholestyramine has demonstrated effectiveness in rapidly reducing thyroid hormone levels in these conditions. Studies indicates that cholestyramine accelerates the reduction of T3 and T4 levels when used as adjunctive therapy alongside standard treatments, particularly in severe or refractory cases. Evidence from case reports also supports its utility in managing conditions such as amiodarone-induced thyrotoxicosis, thyroid storm, and preparation for thyroidectomy. However, the long-term effectiveness of cholestyramine remains uncertain, with potential challenges regarding gastrointestinal side effects and medication interactions. Further studies are needed to integrate it more widely into clinical guidelines for the management of thyroid disorders.
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