In November 2022, the long-awaited update to the United States Pharmacopoeia (USP) General Chapter <795> on Non-Sterile Compounding was released. The revisions have many non-sterile compounding pharmacies across the United States buzzing with questions about what necessary changes must be implemented, sparking renewed interest in primary engineering controls (PECs).

PECs are devices employed directly at the point of use¹ that control airborne contamination from the working environment². The USP <795> Chapter calls out specific requirements for PECs used in non-hazardous and hazardous compounding in order to ensure compounder safety and minimize environmental exposure. PECs can be broken down into three main categories²:

• Containment ventilated enclosure (CVE, i.e., powder hoods).
• Biological safety cabinet (BSC, i.e., laminar flow hoods).
• Compounding aseptic containment isolator (CACI).

During the compounding of hazardous drugs, PECs are designed to ensure the containment of hazardous material, hence the name containment PECs (C-PECs)². But the challenge remains: which PECs to use and how to be compliant with USP Chapters <795> and <800>?.

The regulations surrounding PECs used in non-sterile compounding leave room for interpretation, illumining the importance of implementing best practices. Being compliant is one thing. Applying best practices is another. It is the collective responsibility of all compounders to uphold the integrity of the compounding practice. As you adopt these standards and apply best practices, you'll not only stand out from the competition but, more importantly, position yourself as a preferred partner for physicians seeking collaboration and patients needing your services. After all, physicians look for trusted partners who prioritize quality and patient safety. Patients, in turn, seek reliable pharmacies they can entrust with their health.

Although the USP <795> does not lay forth specifics on hood selection for non-sterile non-hazardous compounding, it does require that compounding pharmacies perform an evaluation to determine what compounding activities result in powder generation. To better understand where such activities must be conducted in a hood, see the excerpt from the new USP <795> chapter below³:

Interestingly, the USP stops short of clearly defining how to assess powder generation, making it vague. However, if you've ever weighed out stevia and tasted its sweet flavor in the air or seen wisps of ketoprofen dust floating around while compounding, you know for certain that powders can indeed become airborne. By these lines, although the chapter takes a roundabout way of outlining when hoods are required, it is hard to imagine an instance where they should not be required. There is also value in consistency. All powders can generate airborne particles, so rather than evaluate each product (through an undefined, objective method), performing non-sterile, non-hazardous weighing, measuring, and manipulative activities in that same closed-system space would be more straightforward.
It’s important that we do not underscore the importance of taking the precautions to protect the compounder, safeguard the integrity of the preparation, and reduce cross-contamination exposure. Compounding pharmacist and owner with over 25 years of experience, Mark Filosi, said it well:

So, what’s the take-home message? Simple. A PEC should be required for all non-sterile compounding activities. When evaluating which hood, always look for certifications from reputable organizations to ensure that your chosen equipment aligns with USP standards. For instance, the XPert Filtered Balance System Powder Containment Hood by Labconco is a CVE that checks off all of the boxes. It uses a built-in blower and HEPA filter to contain powders during weighing to help ensure the safety of the compounder.

For hazardous drug compounding, the necessity of a hood is apparent. According to the USP General Chapter <800> on Hazardous Drug Compounding, all activities must be performed in a C-PEC offering personnel and environmental protection through external ventilation or HEPA filtration³. However, when choosing the right hood for your specific compounding activities and compounding space, several factors should be taken into consideration:

With these points in mind, Class I BSCs are designed for personnel and environmental protection by pulling air from the room through the front, away from the operator. They may be externally vented with a single HEPA filter or have two redundant HEPA filters that exhaust back into the room, although USP indicates that the former is preferred3. The RXPert Single Filtered Balance System is an example of a high-quality C-PEC used for hazardous compounding. This Class I BSC is designed to meet the USP <800> standards and features a factory-installed canopy and HEPA filtration.

A Class II BSC used for sterile compounding may be used for occasional non-sterile hazardous compounding but must be decontaminated, cleaned, and disinfected before resuming sterile activities3. A Class II BSC is defined as a ventilated cabinet intended for personnel, product and environmental protection, designed with an open front and inward airflow (personnel protection), downward HEPA-filtered laminar airflow (product protection), and HEPA-filtered exhaust air (environmental protection).

There are many factors to consider when selecting the proper engineering controls for your compounding pharmacy. Yes, you need to be compliant with USP <795> and USP <800>, but you also need to make sure that the devices you choose fit the needs and future direction of your pharmacy. It all boils down to a few questions:

With a team of experts specializing in hood selection for pharmaceutical compounding needs and a portfolio of 40 hoods for non-sterile compounding, Medisca supports compounders in addressing these questions and finding the best-fitted solutions for their specific pharmacy and/or facility needs. Medisca equipment specialists – led by a team of highly trained individuals with years of in-field experience – are here to walk you through all the steps of implementing a USP-compliant hood in your compounding pharmacy.

Ready to embrace best practices and elevate your PECs? Contact an account representative to connect you with an Equipment Specialist today.

Looking for more information on the revised USP General Chapters <795> and <800>? Visit here.