PMID: 10676825Feb 17, 2000Paper

Syndrome of inappropriate antidiuretic hormone secretion associated with lisinopril

The Annals of Pharmacotherapy
Z H ShaikhL A Llerena


To describe a case of the syndrome of inappropriate antidiuretic hormone secretion (SIADH) associated with lisinopril therapy. A 76-year-old white woman who was being treated with lisinopril and metoprolol for hypertension presented with headaches accompanied by nausea and a tingling sensation in her arms. Her serum sodium was 109 mEq/L, with a serum osmolality of 225 mOsm/kg, urine osmolality of 414 mOsm/kg, and spot urine sodium of 122 mEq/L. Diclofenac 75 mg qd for osteoarthritic pain and lisinopril 10 mg qd for hypertension was begun in 1990. Lisinopril was increased to 20 mg qd in August 1994 and to 20 mg bid pm in August 1996 for increasing blood pressure; metoprolol 50 mg qd was added in July 1996. A diagnosis of SIADH was postulated and further evaluation was undertaken to exclude thyroid and adrenal causes. After lisinopril was discontinued and the patient restricted to 1000 mL/d of fluid, serum sodium gradually corrected to 143 mEq/L. The patient was discharged taking metoprolol alone for her hypertension; serum sodium has remained > or =138 mEq/L through April 1999, 32 months after discharge, despite daily use of diclofenac. Angiotensin-converting enzyme (ACE) inhibitors in antihypertensive doses may block conversion...Continue Reading


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Angiotensin-Converting Enzyme Inhibitors
Antihypertensive Agents
Inappropriate ADH Syndrome
Lisinopril Sulfate (1:2)

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