Abstract
Background
Patients with cancer often receive chemotherapeutic agents concurrently with other medications to treat comorbidity. The practical effects of concomitant medications, especially polypharmacy, on adverse drug reactions related to irinotecan-based chemotherapy are not well documented.
Methods
Associations of adverse drug reactions related to irinotecan monotherapy or a combination of irinotecan, 5-fluorouracil, and l-leucovorin (FOLFIRI) with concomitant medicines used to treat comorbidity were retrospectively investigated in Japanese patients with cancer.
Results
Of the 172 patients, 118 received concomitant medications. Twenty-one patients had grade 4 neutropenia and/or grade 3 or 4 diarrhea. Univariate and multivariate analyses revealed that concomitant medications were significantly associated with irinotecan-related severe neutropenia and/or diarrhea (P = 0.023 and 0.044). Multiple concomitant medications were significantly related to severe irinotecan-related toxicity in patients given monotherapy or FOLFIRI (P = 0.01). The incidence of severe irinotecan-related toxicities increased in parallel with the number of concomitant medications.
Conclusion
We found that multiple concomitant medicines were significantly associated with severe irinotecan-related toxicity, indicating that polypharmacy must be effectively managed to decrease the risk of adverse drug reactions in patients with cancer who received irinotecan-based chemotherapy.
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Acknowledgments
This work was supported in part by a Grant-in-Aid for Cancer Research from the Ministry of Health, Labour and Welfare of Japan (21S-8-1 to Y.S.), in part by a Grant-in-Aid for Scientific Research (C) (23590198 to K.F.) from the Japan Society for the Promotion of Science (JSPS), and in part by a Grant-in-Aid for “Support Project of Strategic Research Center in Private Universities” from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) to Saitama Medical University Research Center for Genomic Medicine.
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All authors have no conflict of interests.
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Sasaki, T., Fujita, Ki., Sunakawa, Y. et al. Concomitant polypharmacy is associated with irinotecan-related adverse drug reactions in patients with cancer. Int J Clin Oncol 18, 735–742 (2013). https://doi.org/10.1007/s10147-012-0425-5
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DOI: https://doi.org/10.1007/s10147-012-0425-5