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Postgraduate Medical Journal logoLink to Postgraduate Medical Journal
. 1999 Apr;75(882):235–236. doi: 10.1136/pgmj.75.882.235

Calcium-channel blockade can mask the diagnosis of Conn's syndrome

M Brown 1, R Hopper 1
PMCID: PMC1741191  PMID: 10715768

Abstract

A 30-year-old woman presented with hypertension and hypokalaemia, and was found to have primary aldosteronism due to a Conn's adenoma, whose removal cured the hypertension. Before surgery, the characteristic biochemical changes which enabled the diagnosis were completely masked by administration of a calcium-channel blocker, amlodipine. It is likely that widespread use of this class of drugs contributes to under-diagnosis of Conn's syndrome as a curable cause of hypertension.


Keywords: Conn's syndrome; aldosterone; calcium blockade

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