Background Cisplatin-associated electrolyte dysregulation is a prevalent therapy-related adverse effect. There are numerous electrolyte-supplemented hydration regimens that have been evaluated, however these studies focused on the development of nephrotoxicity. The objective of this study was to characterize the impact of magnesium and potassium-supplemented hydration during cisplatin administration on subsequent magnesium and potassium imbalances. Methods A single-region retrospective study from central Texas at Baylor Scott & White Cancer Clinics who were treated with two or more cycles of cisplatin were included. Standard hydration for this study was defined as normal saline before and after cisplatin along with potassium chloride 10 mEq and magnesium sulfate 1 g added to the cisplatin bag. Results A total of 477 patients were included in the study with376 patients receiving the standard hydration. Overall, 17 percent of patients experienced a potassium level below 3.5 mEq/L, but no major depletion was observed. Thirty-three percent of the patients experienced a magnesium level below 1.8 mg/dL, and time to first rescue magnesium supplementation was 4 weeks. Conclusion Our study demonstrated despite routine magnesium and potassium supplementation in hydration, magnesium imbalances were observed. Potassium levels post cisplatin administration were maintained with minimal routine supplementation in hydration.
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