Hypocalcaemia after an occult calcium channel blocker overdose: a case report and literature review.

Hypocalcaemia is a rare complication of calcium channel blocker overdose, having been reported only once previously (J Toxicol Clin Toxicol, 1992, 30, 309). In this article, we report a case of a 37-year-old woman who developed hypocalcaemia after a verapamil overdose, review the literature and propose a mechanism for this rare finding.