Abstract
Proton pump inhibitors (PPIs) are widely prescribed medications that have effects on both enteric and urinary solute handling with an unknown effect on risk of nephrolithiasis. Our objectives were to examine the association between PPI exposure and incident nephrolithiasis and to determine its effect on 24H urine chemistry. We performed a single-center retrospective study on patients diagnosed with gastroesophageal reflux disease (GERD) without a history of kidney stones. Exposure to PPIs was abstracted, and then subsequent kidney stone diagnoses were identified. Multivariable Cox models with time-varying covariates were used to estimate the hazard of PPI use on incident nephrolithiasis. We used multivariable linear regression to analyze a subset of patients who went through 24-h urine analysis. We identified n = 55,765 PPI-naïve GERD patients without prior kidney stone diagnoses of whom 40,866 (73.2%) were exposed to PPI over a median of 3 year follow up. On multivariable analysis, PPI use was associated with higher risk of incident kidney stone diagnoses (HR 1.19, 95% CI 1.06–1.34). Among 593 patients with GERD with 24-H urine data, the PPI-exposed group (n = 307) had significantly lower mean urinary citrate (mean 3.0 vs 3.4 mmol, p = 0.029) and urinary magnesium (mean 3.6 vs 4.3 mmol, p < 0.001) on multivariable analyses. Exposure to PPIs is associated with an increased risk of kidney stones among patients with GERD. Hypomagnesemia and hypocitraturia associated with PPI exposure may contribute to kidney stone risk.
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Abbreviations
- 24H urine:
-
24-Hour urine
- BMI:
-
Body mass index
- CKD:
-
Chronic kidney disease
- EMR:
-
Electronic medical record
- H2RA:
-
Histamine-2 receptor antagonist
- GERD:
-
Gastroesophageal reflux disease
- PPI:
-
Proton pump inhibitor
- SSCaOx:
-
Supersaturation of calcium oxalate
- SSCaP:
-
Supersaturation of calcium phosphate
- SSUA:
-
Supersaturation of uric acid
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Acknowledgements
The authors would like to acknowledge and thank Dr. John Asplin and Dr. Nicholas Kavoussi for their assistance in review of this manuscript.
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The publication described was supported by CTSA award No. UL1 TR002243 from the National Center for Advancing Translational Sciences. Its contents are solely the responsibility of the authors and do not necessarily represent official views of the National Center for Advancing Translational Sciences or the National Institutes of Health.
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Sui, W., Miller, N.L., Gould, E.R. et al. Proton pump inhibitors use and risk of incident nephrolithiasis. Urolithiasis 50, 401–409 (2022). https://doi.org/10.1007/s00240-022-01326-1
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DOI: https://doi.org/10.1007/s00240-022-01326-1