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Background: Pembrolizumab is currently the standard treatment for patients with advanced non-small cell lung cancer (NSCLC). However, the association between immune-related adverse events (irAEs) and peripheral blood cell counts remains unclear. We aimed at identifying peripheral blood cell counts that may predict the development of pembrolizumab-induced irAEs. Methods: We retrospectively analyzed data on consecutive patients with advanced NSCLC who received pembrolizumab monotherapy as first-line or later-line therapy at the National Cancer Center Hospital and Keio University Hospital. We used data between December 2015 and November 2018. The primary endpoint was the relationship between peripheral blood cell count data and early-onset irAEs during the 6-weeks study period. Receiver operating characteristic (ROC) curve and multivariable logistic regression analyses were performed. Results: In total, 92 patients were evaluated, of whom 45 (48.9%) had at least one irAE during the first 6-weeks after treatment initiation. The ROC curves revealed that the optimal cutoff of pretreatment absolute lymphocyte count (ALC), neutrophil-to-lymphocyte ratio (NLR), lymphocyte-to-monocyte ratio (LMR), and platelet-to-lymphocyte ratio (PLR) for onset of irAEs were 1459, 2.320, 1.538, and 165, respectively. Multivariable logistic regression analyses revealed that pretreatment ALC>1450 and LMR>1.6 were significantly associated with a reduced risk for onset of any irAEs, whereas pretreatment NLR>2.3 and PLR>165 were significantly associated with an increased risk. Conclusions: The findings suggest that considering the routine availability of blood cell count data before the initiation of treatment with pembrolizumab, it may be useful in identifying early-onset irAEs during the 6-weeks study period in clinical practice.

This is the first report to evaluate whether community pharmacists are equipped to ensure the safe use of oral anticancer agents in Japan. The results are similar to those previously reported for Canadian pharmacists, namely a low rate of positive responses for education in oncology and oral chemotherapy, demonstrating a similar need for additional education and training in oral chemotherapy.

Objectives: Medical oncologists and pharmacists at our institution established an integrated support program aimed at preventing unnecessary treatment interruption or dose reduction during oral targeted therapy with lenvatinib. Here, we evaluated the benefits of this program in managing patients with thyroid cancer receiving lenvatinib. Methods: We retrospectively evaluated thyroid cancer patients who received lenvatinib between May 2015 and March 2017. This descriptive study collected records in which pharmacists contributed to changing doctors’ prescriptions and categorized the interventions. Results: During the study period, 24 thyroid cancer patients were treated with lenvatinib. Among patients, the incidence of temporary interruption and dose reduction of lenvatinib due to adverse drug reactions was 100% (n = 24) and 83.3% (n = 20), respectively. There were 193 temporary interruptions of lenvatinib due to adverse drug reactions. A total of 501 outpatient pharmacy services were conducted by pharmacists in collaboration with oncologists, of which 125 were interventions (24.9%). In addition, pharmacists conducted 156 telephone follow-up services; 18 (11.5%) of these were to consult an oncologist about a patient’s confirmed problems and resulted in the decision to continue observation with no medical intervention while 41 (26.2%) resulted in the oncologist deciding to temporarily interrupt lenvatinib treatment after the report of an adverse drug reaction from the pharmacist. Conclusion: Pharmacist interventions in collaboration with medical oncologists improved lenvatinib therapy. Interventions for outpatients were conducted not only in outpatient clinics but also by telephone follow-up, clarifying the importance of continuous management for patients at risk of adverse reactions and misuse of oral medicine.

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Background Collaboration between pharmacists, doctors, and nurses in outpatient treatment is beneficial; however, such services are limited in Japan due to the lack of a healthcare reimbursement fee for outpatient pharmacy services at outpatient clinic. Objective We evaluated the impact of a service in which clinical pharmacists collaborated with an oncologist at an outpatient clinic in the treatment of adverse drug reactions in outpatient cancer chemotherapy. Methods We performed a retrospective cohort study using patients' medical records and treatment diaries. Subjects were patients who received outpatient chemotherapy via a clinical pharmacist collaboration service provided by six outpatient pharmacists and an oncologist at an outpatient clinic between June and August 2016. Results During the study period, the total number of outpatient services was 2508, with 2055 (81%) related to chemotherapy. The six outpatient pharmacists provided interventions to 498 of the 2055 cases (24%). Of the 498 interventions, 103 (20%), in addition to oncologist's prescription, were suggested treatments for adverse drug reactions due to cancer chemotherapy. Oncologists approved a total of 82 prescription suggestions from pharmacists (79%) to 63 patients. Fifty-seven percent ( n = 47) of the adverse drug reactions were improved following the pharmacists' suggested prescriptions. Conclusions This is the first study to clarify the benefits of outpatient pharmacy services in which pharmacists collaborate with oncologists at an outpatient clinic for the management of adverse drug reactions in cancer patients in Japan.