2.7 Contingency Planning: Power, HVAC, Supply and Staffing Failures

2.7 Contingency Planning: Power, HVAC, Supply and Staffing Failures

Sterile compounding depends on many systems working at once: HVAC, HEPA filters, pressure monitoring, electricity, water, sterile supplies, trained people and software. The BCSCP outline lists contingency planning (task 1C8) as its own task, because patients still need their preparations when one of those systems fails. A strong plan is written, trained, drilled and reviewed. It sets out who decides, what stops, what continues under reduced conditions, and how the facility proves it has recovered.

Failure modes and required responses

Two USP rules often surprise candidates. First, if a PEC's HEPA-filtered air is counted toward the room's 30 air changes per hour, that PEC must not be turned off except for maintenance, because switching it off drops the room below its design. Second, servicing any facility or equipment, including a HEPA filter change, triggers microbiological air and surface sampling before normal operation resumes.

Designing a degraded-mode workflow

When the cleanroom suite is down, the question is what can still be made safely. Common, defensible options include:

1. Category 1 work in a certified PEC located in a segregated compounding area, if one exists, with Category 1 BUDs (12 hours at room temperature, 24 hours refrigerated).
2. Immediate-use preparation at the point of care for doses that truly meet all seven USP <797> 1.3 conditions (see 1.4).
3. Ready-to-use commercial products, such as premixed bags and prefilled syringes, which remove the need to compound.
4. Outsourcing to a 503B facility. The supplier should be qualified in advance: FDA registration, inspection history (Forms 483, Warning Letters), product-specific testing and dating, and a quality agreement.
5. Deferring non-urgent CSPs until the room is restored and sampling confirms control.

An SOP should state which option applies to which product and who authorizes the switch. Returning to normal status should require documented evidence: pressure restored, cleaning completed, sampling results reviewed and, if needed, recertification.

Supply and drug shortages

Shortages affect drugs, sterile 70% IPA, gloves, gowns, filters, growth media and syringes.

• Substitution control: Any substitute supply (a different glove, filter or syringe brand) is checked for compatibility and suitability, and SOPs, MFRs and training are updated before use.
• Compounding during drug shortages: For Section 503A, FDA does not consider a drug on its drug shortage list to be "commercially available." A pharmacy may therefore compound a copy of it without violating the essentially-copy restriction. Outsourcing facilities under 503B may likewise compound drugs that appear on FDA's shortage list.
• Allocation and communication: The pharmacy works with prescribers and committees on therapeutic alternatives, dose rounding and conservation, and documents those decisions.

Information system downtime

IV workflow systems, ACD software, EHR order interfaces and label printers all fail sometimes. Downtime procedures should include paper compounding records that still capture every USP <797> Box 10 element, manual independent checks in place of barcode or gravimetric verification, and printed ACD recipes and calibration logs. On recovery, paper records are reconciled into the electronic system.

Staffing and competency gaps

A contingency plan must not quietly suspend personnel requirements. Anyone who compounds during an emergency still needs current garbing and aseptic manipulation competency. Cross-training more staff than the minimum schedule requires, and keeping competency dates staggered, stops qualifications from all lapsing at once.

Hazardous drug specifics (USP <800>)

• A C-PEC that provides some or all of the C-SEC's negative pressure, or is used for sterile compounding, must run continuously. USP <800> suggests considering uninterruptible power for the ventilation that maintains negative pressure.
• Spill kits and trained responders must be available whenever HDs are handled, including during emergencies and in non-routine locations.

Emergency power and design

ASHRAE design guidance for compounding pharmacies recommends putting PECs, room HVAC and pressure monitors on essential (backup) power circuits. A pharmacist reviewing a renovation should confirm which loads are on generator power and how long the backup lasts.

USP also published Operational Considerations for Sterile Compounding During Public Health Emergencies in October 2024. Use it as a reference when writing pandemic and disaster procedures.