An electrolyte disturbance masquerading as a panic attack.

Because proton pump inhibitors (PPIs) are so commonly used, their safety and potential adverse reactions often are not considered. This article describes a patient whose paresthesias and severe muscle cramps were attributed to panic attacks but actually were caused by hypocalcemia secondary to PPI-induced hypomagnesemia. This case serves as a reminder that PPIs should be used cautiously and appropriately with consideration for regular monitoring of electrolytes and vitamin B12.