Racial and ethnic disparities in healthcare can affect patient safety and contribute to adverse health outcomes. This review outlines the impact of health disparities and treatment decision-making biases (implicit bias, default bias, delay discounting, and availability bias) on cancer-related adverse effects among Black cancer survivors. The authors identify several ways that nurses may help mitigate health disparity-related adverse treatment effects, such as providing culturally appropriate care; assessing patient health literacy and comprehension; educating, empowering, and advocating for patients; and adhering to evidence-based guidelines for monitoring and management of treatment-related adverse events. The authors also discuss the importance of ongoing training on the impact of structural racism, ways to mitigate its effects, and the role of research and implementation to reduce implicit bias.