Prevalence of potential drug-drug interactions in cancer patients treated with oral anticancer drugs

R. W. F. van Leeuwen*, D. H. S. Brundel, C. Neef, T. van Gelder, R. H. J. Mathijssen, D. M. Burger, F. G. A. Jansman

*Corresponding author for this work

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    Abstract

    Background: Potential drug-drug interactions (PDDIs) in patients with cancer are common, but have not previously been quantified for oral anticancer treatment. We assessed the prevalence and seriousness of potential PDDIs among ambulatory cancer patients on oral anticancer treatment.

    Methods: A search was conducted in a computer-based medication prescription system for dispensing oral anticancer drugs to outpatients in three Dutch centres. Potential drug-drug interactions were identified using electronic (Drug Interaction Fact software) and manual screening methods (peer-reviewed reports).

    Results: In the 898 patients included in the study, 1359 PDDIs were identified in 426 patients (46%, 95% confidence interval (CI) = 42-50%). In 143 patients (16%), a major PDDI was identified. The drug classes most frequently involved in a major PDDI were coumarins and opioids. The majority of cases concerned central nervous system interactions, PDDIs that can cause gastrointestinal toxicity and prolongation of QT intervals. In multivariate analysis, concomitant use of more drugs (odds ratio (OR) = 1.66, 95% CI = 1.54-1.78, P

    Conclusion: Potential drug-drug interactions are very common among cancer patients on oral cancer therapy. Physicians and pharmacists should be more aware of these potential interactions.

    Original languageEnglish
    Pages (from-to)1071-1078
    Number of pages8
    JournalBritish Jounal of Cancer
    Volume108
    Issue number5
    DOIs
    Publication statusPublished - 19-Mar-2013
    Event37th Congress of the European-Society-for-Medical-Oncology (ESMO) - Vienna, Austria
    Duration: 28-Sep-20122-Oct-2012

    Keywords

    • chemotherapy
    • potential drug-drug interactions
    • oncology
    • pharmacology
    • risk factors
    • LOW-DOSE METHOTREXATE
    • IRINOTECAN METABOLISM
    • RHEUMATOID-ARTHRITIS
    • MEDICAL PATIENTS
    • ELDERLY PERSONS
    • OLDER-PEOPLE
    • FALLS
    • PHARMACOKINETICS
    • METAANALYSIS
    • FLUCONAZOLE

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