[Pharmaceutical Verification of Chemotherapy-induced Adverse Events]

Managing adverse events is important for optimizing cancer treatment and ensuring high patient satisfaction. Studies have assessed (1) anti-epidermal growth factor receptor (EGFR) monoclonal antibody-induced skin toxicities, (2) development of severe neutropenia by renally excreted anticancer drugs in patients with renal impairment (RI), and (3) pharmaceutical care in the treatment of immune checkpoint inhibitors (ICIs). We identified liver metastasis as a risk factor and preemptive systemic antibiotic administration with anti-inflammatory effect as a preventive factor for grade ≥2 overall skin toxicities in anti-EGFR treatment for metastatic colorectal cancer (mCRC). Additional prophylactic topical steroids to systemic minocycline significantly prevented grade ≥2 rashes, but did not mitigate overall skin toxicities. Patients receiving trifluridine/tipiracil (FTD/TPI)-based chemotherapy for mCRC were assessed, resulting in significantly higher early severe neutropenia development among patients with RI. Additionally, we assessed the impact of RI on severe neutropenia development in carboplatin+pemetrexed-based chemotherapy for thoracic cancer. Consequently, severe neutropenia in the first cycle and all-treatment cycles was significantly more confirmed in patients with RI. We assessed the usefulness of pharmaceutical interventions in ICI treatment, which suggested that pharmaceutical care may improve quality of outpatient ICI treatment, and pharmaceutical intervention during the first three months after initiation of ICI treatment is crucial. Our studies have found clinically important outcomes that support the provision of less onerous chemotherapy.