Abstract
The effectiveness of imatinib, a tyrosine kinase inhibitor recommended for the treatment of chronic myeloid leukemia, is associated with high adherence and trough plasma imatinib concentrations of ~1,000 ng/mL. However, adherence and therapeutic drug monitoring (TDM) for imatinib have hardly been reported. This study evaluated the prevalence of TDM and adherence to imatinib for chronic myeloid leukemia in Japan. Monthly insurance claims data for ~5.6million individuals aged 20-74 years between June 1, 2005 and December 31, 2017 were studied. Patients with at least one prescription for imatinib were included to calculate adherence and the annual mean prevalence of TDM for imatinib. A total of 498 patients with 9,620 prescriptions of imatinib were included. After 2013, the number of imatinib prescriptions and the number of patients treated with imatinib were over 1,000 and 200, respectively. The mean annual prevalence of TDM for imatinib was 12.2% (95% confidence interval (CI), 8.1-16.1%). Antihyperuricemic drugs and steroids increased the likelihood of TDM. The medication possession ratio for assessment of adherence was 93.5% (95% CI: 91.8-95.5%). The annual mean prevalence of TDM for imatinib was low, although adherence was high. To encourage the measurement of plasma concentrations of imatinib in clinical settings, adding a package insert, a summary of product characteristics, and a patient information leaflet regarding the implementation of TDM is justified and warrants further attention.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: International journal of clinical pharmacology and therapeutics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.