BACKGROUND: Chemotherapy agents like ifosfamide can cause dose-limiting renal and central nervous system (CNS) toxicities. Routinely assessing for CNS changes associated with ifosfamide was not standard nursing practice, and the lack of provider and nursing knowledge of subtle CNS changes was identified as a safety factor that needed improving. OBJECTIVES: The purpose of this quality improvement project was to implement an evidence-based nursing assessment tool to provide early identification of ifosfamide toxicity. METHODS: The project team created an internal tool incorporating the Common Terminology Criteria for Adverse Events to categorize and grade toxicity symptoms. Nurses used the tool to assess patients' renal and CNS baselines and monitor for 13 potential symptoms throughout ifosfamide administration. FINDINGS: Acute care oncology nurses felt empowered to report subtle CNS changes when using the tool, leading to early identification of ifosfamide toxicity.