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Feingold KR, Anawalt B, Blackman MR, et al., editors. Endotext [Internet]. South Dartmouth (MA): MDText.com, Inc.; 2000-.

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Table 5-1Agents Inhibiting Thyroid Hormone Synthesis and Secretion

Block iodide transport into the thyroid gland
Substance Common Use
Monovalent anions (SCN-, Cl04-, N03-)aNot in current use; Cl04- test agent
Complex anions (monofluorosulfonate,difluorophosphate, fluoroborate)a-------
Minerals (bromine, fluorine)In diet
LithiumaTreatment of manic-depressive psychosis
EthionamideAntituberculosis drug
Impair TG iodination and iodotyrosine coupling
Substance Common Use
Thionamides and thiourylenes, (PTU,methimazole, carbimazole)aAntithyroid drugs
Sulfonamides (acetazolamide, sulfadiazine, sulfisoxazole)aDiuretic, bacteriostatic
Sulfonylureas (carbutamide, tolbutamide, metahexamide, ?chloropropamide)aHypoglycemic agents
Salicylamides (p-aminosalicylic acid, p-aminobenzoic acid)aAntituberculosis drugs
ResorcinolCutaneous antiseptic
AmphenoneAnticonvulsive
AminoglutethimideAntiadrenal agent
ThiocyanateaNo current use; in diet
Antipyrine (phenazone)aAntiasthmatic
Aminotriazole"Cranberry poison”
AmphenidoneTranquilizer
2,3-Dimercaptopropanol (BAL)Chelating agent
KetoconozoleAntifungal agent
Inhibitors of thyroid hormone secretion
Substance Common Use
Amiodarone aAntianginal and antiarrhythmic agent
Iodide (in large doses)aAntiseptic, expectorant, and others
LithiumaTreatment of manic-depressive psychosis
Cause Thryoiditis
Substance Common Use
Amiodarone aAntianginal and antiarrhythmic agent
Interleukin II aCancer therapy
g-Interferon aAntiviral and cancer therapy
Sunitinib aCancer therapy
Sorafenib aCancer therapy
Ipilmumab aCancer therapy
Pembrolizumab aCancer therapy
Nivolumab aCancer therapy
Mechanism unknown
Substance Common Use
p-bromdylamine maleate aAntihistamine
Phenylbutazone aAntiinflammatory agent
Minerals (calcium, rubidium, cobalt)a-------
Thalidomide396Cancer therapy
aReferences given in the text

From: Effects of the Environment, Chemicals and Drugs on Thyroid Function

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