Objectives: The aim of this study was to investigate both the time-to-onset and the onset-pattern of drug-induced blood disorders (DIBD) following the administration of small molecule molecularly-targeted drugs via the use of the spontaneous adverse reaction reporting system of the Japanese Adverse Drug Event Report (JADER) database.
Methods: The JADER database from April 2004 to March 2017 was downloaded from the Pharmaceuticals and Medical Devices Agency (PMDA) website. The DIBD dataset for small molecule molecularly-targeted drugs was constructed based on the data for the patient demographic information, drug information, and the adverse drug reaction information for thrombocytopenia, platelet count decreased, neutropenia, neutrophil count decreased, leukopenia, white blood cell count decreased, pancytopenia, and anaemia of the Preferred Term in Medical Dictionary for Regulatory Activities (MedDRA). This dataset was then used to calculate the median onset times for the DIBD and the Weibull distribution parameters.
Results: The median onset times of the DIBD for bortezomib, dasatinib, erlotinib, everolimus, and temsirolimus were less than 2 weeks, with the Weibull distribution determining an early failure type profile for dasatinib and temsirolimus, a random failure type profile for bortezomib and erlotinib, and a wear out failure type profile for everolimus. The median onset times of the DIBD for crizotinib, gefitinib, imatinib, lapatinib, nilotinib, sorafenib, and sunitinib ranged from 2 to 4 weeks, with the Weibull distribution determining an early failure type profile for imatinib, sorafenib, and sunitinib, a random failure type profile for crizotinib, gefitinib, and lapatinib, and a wear out failure type profile for nilotinib.
Conclusions: The results of the current study clarified both the most likely time period and the onset-pattern of DIBD that can occur in patients after the administration of small molecule molecularly-targeted drugs.
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