What type of filter must be used for hazardous drug preparation?

• A. Carbon filter
• B. HEPA filter
• C. Paper filter
• D. Fiberglass filter

Answer: (B)

When preparing hazardous drugs, a HEPA filter is essential due to its capability to trap airborne particles effectively, including potentially harmful drugs and other particulate contaminants. HEPA, which stands for High-Efficiency Particulate Air, filters out at least 99.97% of particles that are 0.3 micrometers in diameter. This is crucial in maintaining a safe workspace, as the particles from hazardous drugs can pose significant health risks to personnel.

In addition to providing protection from these particulates, the HEPA filter is part of a broader engineering control system, often in conjunction with a Class II biosafety cabinet or compounding aseptic containment isolator, which are specifically designed to handle hazardous materials safely. By filtering the air entering the workspace, the HEPA filter helps maintain a sterile environment, preventing contamination and exposure.

In contrast, the other types of filters mentioned—carbon, paper, and fiberglass—are not designed for the specific requirements of hazardous drug preparation. Carbon filters are typically used for gas and vapors, paper filters are generally used for basic filtration purposes and do not provide the necessary protection against fine particulates, and fiberglass filters may not have the required efficiency for handling hazardous pharmaceutical agents. Therefore, using a HEPA filter