Is it wise to take magnesium if on ppi's longterm? If so, oxide, citrate?

Low magnesium levels. Are associated with use of proton pump inhibitors, especially if on diuretics. With long-term use prescriber should check magnesium level and direct magnesium supplementation accordingly, but this is not enough in 25% of cases and discontinuation of ppi becomes necessary. Magnesium citrate is more soluble and bioavailable than magnesium oxide. Best regards.