Journal
CURRENT OPINION IN GASTROENTEROLOGY
Volume 27, Issue 2, Pages 180-185Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/MOG.0b013e32833ff5d6
Keywords
hypocalcaemia; hypomagnesaemia; intestinal magnesium absorption; proton pump inhibitors
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Purpose of review Hypomagnesaemia has recently been recognized as a rare, but severe, complication of proton pump inhibitor (PPI) use. We reviewed all the cases published to date in peer-reviewed journals to summarize what is known of the epidemiology, risk factors, cause and treatment. Recent findings Hypomagnesaemia has been described with all substituted pyridylmethylsulphonyl benzimidazadole derivatives and is a class effect, recurring with substitution of one PPI for another. A long duration of use and high rates of adherence are probably risk factors, but the prevalence is unknown. The diagnosis is often missed, despite the severe symptomatology. Renal magnesium handling is normal, so implicating impairment of net intestinal absorption as the proximate cause. It is not known whether this is the consequence of defective absorption of magnesium through the active or passive transport processes, or increased losses. Summary PPI-associated hypomagnesaemia is a rare, but potentially life-threatening, side-effect that has emerged only in the era of mass use of these agents. The cause of hypomagnesaemia remains poorly understood, but it responds rapidly to withdrawal of the PPI.
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