In this episode, Subhi Saadeh delves into the specifics of USP chapters 788 and 790, which focus on the testing and acceptance criteria for sub-visible and visible particles in injectable drug products. He explains the importance of these standards in preventing health risks such as embolisms and allergic reactions. The episode outlines the methods used for testing, including light obscuration and microscopic particle count tests, as well as the required visual inspections for visible particles. Subhi also discusses the differences in scope between USP and ISO standards and emphasizes the critical role of operator training and clean handling practices in ensuring product safety.