# The Use of Amiloride and Sodium-Glucose Cotransporter 2 Inhibitors in Cisplatin-Induced Hypomagnesemia: A Case Report and Review of the Literature

## TL;DR

This paper discusses the use of amiloride and SGLT2 inhibitors to treat hypomagnesemia caused by cisplatin chemotherapy.

## Contribution

The paper reviews the potential of amiloride and SGLT2 inhibitors as off-label treatments for cisplatin-induced hypomagnesemia.

## Key findings

- Amiloride and SGLT2 inhibitors may reduce urinary magnesium excretion in cisplatin-induced hypomagnesemia.
- SGLT2 inhibitors showed positive effects on hypomagnesemia in a meta-analysis of 18 trials.
- Current use of these drugs for hypomagnesemia is considered off-label.

## Abstract

Cisplatin, a chemotherapy agent widely used since its FDA approval in 1978 for testicular cancer, is associated with nephrotoxicity and hypomagnesemia. Magnesium supplementation is not only a treatment for hypomagnesemia but also a well-established agent in preventing cisplatin-induced nephrotoxicity (CIN). Considering the challenges associated with intravenous magnesium use and even with the supplementation of oral forms, there is a need for drugs that effectively reduce urinary magnesium excretion. Amiloride and sodium-glucose cotransporter 2 inhibitors (SGLT2 inhibitors) have emerged as potential candidates. Amiloride is a well-known potassium-sparing diuretic that also has a hypomagnesemia effect seen in preclinical data. SGLT2 inhibitors are a drug class initially used in diabetes that was also observed to have positive effects on cardiovascular mortality, diabetic kidney disease, and hypomagnesemia. SGLT2 inhibitors were found to reduce hypomagnesemia in a meta-analysis study of 18 trials. However, these trials were not specifically designed for the evaluation of hypomagnesemia, and their current use in hypomagnesemia is considered off-label.