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Influence of oral magnesium-containing supplement and antacid administration on hypomagnesemia induced by panitumumab

  • Junya SatoEmail author
  • Hiroshi Ishikawa
  • Rei Tanaka
  • Michihiro Sino
Original Article
  • 94 Downloads

Abstract

Purpose

Hypomagnesemia is a common side effect of panitumumab. The effect of magnesium-containing supplement as a laxative and concomitant antacid (proton pump inhibitor and histamine H2 antagonist) administration on panitumumab-induced hypomagnesemia was retrospectively investigated.

Methods

Patients with advanced or recurrent colorectal cancer who received panitumumab were included in this study. Serum magnesium levels were extracted from the electronic medical records of 1753 administrations in 221 patients who received panitumumab. Serum magnesium levels in patients with or without oral magnesium-containing supplement and antacid treatment were compared using analysis of covariance as the number of panitumumab administration up to 16 times for covariates.

Results

The mean serum magnesium levels were significantly decreased with increasing number of panitumumab administrations (2.13 mg/dL at 1st vs. 1.55 mg/dL at 16th, p < 0.001). The use of oral magnesium-containing supplement significantly inhibited the decline in mean serum magnesium level (1.98 mg/dL vs. 1.78 mg/dL, p < 0.001). However, antacid use in patients receiving oral magnesium-containing supplement significantly decreased the effectiveness of the magnesium supplement on serum magnesium level (2.02 mg/dL vs. 1.93 mg/dL, p < 0.05).

Conclusion

The use of oral magnesium-containing supplement might function as magnesium supplement based on the finding that use of oral magnesium-containing supplement during panitumumab administration decreased hypomagnesemia. However, combination of antacid decreased the supplemental effect of oral magnesium on hypomagnesemia. These results suggest the possibility that use of antacids during anti-EGFR antibody administration may promote hypomagnesemia.

Keywords

Hypomagnesemia Panitumumab Magnesium salt Antacids Proton pump inhibitor Histamine H2 antagonist 

Notes

Funding

This study was funded by a research grant of Shizuoka Cancer Center.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of PharmacyShizuoka Cancer CenterSunto-gunJapan

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