Medicinal Mishap: Proton Pump Inhibitor-Associated Hypomagnesaemia and Hypocalcaemia

Hypomagnesaemia is a rare, potentially serious, adverse class effect of proton pump inhibitors, which is likely to be under recognised. Patients with suggestive symptoms, hypocalcaemia or ‘idiopathic’ hypoparathyroidism should be asked about their drug history.