USP Chapter 797 cleanroom design requires that facilities pressurize non-hazardous compounding and storage areas. ISO 5, 7 and 8 environments support primary engineering controls, buffer rooms, and ante-rooms.
New USP guidelines may present challenges for compounding facilities. Some facilities need infrastructural and mechanical modifications for compliance. System evaluation includes duct systems, HEPA fan filters, differential pressure standards, air monitoring, and external air exhaust equipment.
Facilities unpacking hazardous drugs within a negative pressure room do not require procedural changes to meet USP unpacking area requirements. Facilities unpacking HDs within positive pressure ante rooms or facility spaces will require reconsideration.