Particulates in injectable drug products continue to be an area of great interest in the industry. The main reason is the potential clinical effects on patients, which can range from emboli to inflammations to infections. There are a series of clinical risk factors that should be considered in evaluating and mitigating these challenges. These factors are route of administration, patient population, and particulate composition (i.e., number, size, and shape). All are critical inputs to understanding risk and determining corrective and preventative actions.