Which condition is classified as HIGH RISK?

• A. Compounded from non-sterile ingredients
• B. Sterile device used before terminal sterilization
• C. Water-containing preps stored more than 6 hours
• D. All non-sterile devices rinsed with sterile pyrogen-free water and dried

Answer: (A)

In sterile compounding, how a product is started and handled determines its risk level. High-risk sterile preparations are those that begin with materials whose sterility cannot be guaranteed—namely, non-sterile starting ingredients or sterile ingredients that have been exposed to non-sterile conditions. Because sterility isn’t assured from the outset, the final product requires more stringent sterilization, validation, and handling, and it carries the highest risk of contamination.

Compounding from non-sterile ingredients fits this category perfectly: you’re starting with substances that aren’t sterile, so you cannot assume the final product is sterile without a robust sterilization process and appropriate verification. The other scenarios involve steps or conditions that, while they may affect quality or require proper process controls, do not by themselves define a high-risk starting point for a sterile preparation.