Master formulation and compounding records, labels and documentation

Why Documentation Is the Foundation of Compounding

Every compounded preparation begins and ends with paper—or its electronic equivalent. Without complete, accurate records, no one can verify what was made, whether it was made correctly, or whether a patient received a safe product. USP chapters <795> (non-sterile), <797> (sterile), and <800> (hazardous drugs) all require two core documents: the Master Formulation Record (MFR) and the Compounding Record (CR). These two documents work together the way a recipe and a cooking log work together—the MFR is the recipe; the CR is the proof that the recipe was followed on a specific day for a specific patient.

Master Formulation Record (MFR)

The MFR is the pharmacy's official formula for a preparation. It is written and approved before any compounding begins and does not change batch to batch. Think of it as a standing instruction set.

A complete MFR must include, at minimum:

• Name, strength, and dosage form of the preparation (e.g., Hydrocortisone 2.5% Cream)
• Ingredients and their quantities for a defined batch size, including all active and inactive (excipient) ingredients
• Grade and source requirements where applicable (e.g., USP-grade chemicals)
• Equipment and supplies needed (e.g., ointment slab, electronic balance, beakers)
• Step-by-step compounding instructions written clearly enough that any trained technician can follow them without additional guidance
• Quality control (QC) procedures—checks performed during and after compounding (e.g., pH measurement, visual inspection, weight verification)
• Beyond-use date (BUD) assignment with the reference or rationale supporting it
• Packaging and storage requirements
• References (the source of the formula, such as a peer-reviewed journal, a published formulary, or a USP monograph)
• Stability information

The MFR is reviewed and signed by the pharmacist responsible for compounding. It is never altered casually; if a formula must change, a new MFR version is created and the old one is archived.

Compounding Record (CR)

The CR is the batch-specific document completed while compounding actually happens. It links a specific preparation back to its MFR and captures every detail needed to reconstruct exactly what was done.

Required elements of a CR include:

• Reference to the MFR (name, version number, or other identifier)
• Date and time of compounding
• Names and quantities of all ingredients actually used, recorded as they are weighed or measured
• Manufacturer, lot number, and expiration date of each ingredient
• Equipment used (identified by label or log number if calibrated)
• Compounding personnel—the technician performing the work and the pharmacist who verified it, both identified by signature or initials
• Assigned BUD and lot number for the finished preparation
• QC results (e.g., final weight or volume, pH, appearance)
• Quantity prepared and dispensing information
• Any deviations from the MFR, documented and initialed by the pharmacist

The CR must be completed in real time—not reconstructed after the fact. Entries made from memory introduce errors that can harm patients.

Labels for Compounded Preparations

Every compounded preparation must carry a label that includes the patient's name (for patient-specific preparations), the preparation name and strength, the BUD, storage conditions, the pharmacy name and address, and any auxiliary warnings (e.g., "Refrigerate," "Shake Well," or hazardous-drug handling symbols required by <800>). The label is generated from CR data, so an incomplete CR leads directly to an incomplete or inaccurate label—a patient-safety failure.

Beyond-Use Dates

The BUD is not the same as an expiration date. An expiration date is assigned by a manufacturer after extensive stability testing. A BUD is assigned by the compounding pharmacy based on the formulation, container, storage conditions, and guidance from USP chapters or published stability data. BUDs must be conservative when full stability data are unavailable. Assigning a BUD that is longer than supported by evidence puts patients at risk of receiving a degraded or contaminated product.

Hazardous Drug Considerations (<800>)

When compounding hazardous drugs, the CR must also document the use of required personal protective equipment (PPE), the containment primary engineering control (C-PEC) used, and waste-disposal steps. This protects both the compounder and verifies regulatory compliance. Labels on hazardous preparations must carry the required warning.

Completing a Record So Another Technician Can Repeat It

The test of a good MFR and CR is simple: hand them to a trained technician who was not present and ask whether that person could reproduce the preparation exactly. If any step, quantity, lot number, or check is missing, the answer is no. Common gaps found in audits include:

• Lot numbers left blank
• BUD written without a rationale
• Initials missing for individual steps
• Deviations undocumented
• Equipment calibration records not cited

Catching these gaps before a preparation leaves the pharmacy is the purpose of the pharmacist's final verification—and the purpose of learning to audit records now.

Record Retention

Pharmacies must retain compounding records for the period required by state law and, where applicable, federal requirements. Minimum retention periods vary; some states require two years or longer. Records must be retrievable if a complaint or adverse event investigation occurs.