5.4 Non-Sterile Compounding Standards

5.4 Non-Sterile Compounding Standards

Compounding vs. Manufacturing

Compounding is the preparation, mixing, assembling, packaging, or labeling of a drug or device in accordance with a licensed practitioner's prescription under an initiative based on the practitioner/patient/pharmacist/compounder relationship in the course of professional practice.

The distinction between compounding and manufacturing is critical.

• Compounding is patient-specific, small-scale, and regulated primarily by state boards of pharmacy (under 503A of the Food, Drug, and Cosmetic Act).
• Manufacturing involves large-scale production of non-patient-specific drugs for resale, which is highly regulated by the FDA (requiring Current Good Manufacturing Practices, CGMP).

In California, a pharmacy may compound a reasonable quantity of a drug in anticipation of receiving prescriptions (anticipatory compounding) based on historical dispensing patterns, but the drug cannot be dispensed until a valid patient-specific prescription is received. Such compounding is an essential service for patients who cannot tolerate commercially available forms, need custom strengths, or have allergies to certain excipients used in manufactured products.

Regulations: 16 CCR § 1735 and USP <795>

Non-sterile compounding in California is governed by the California Code of Regulations (16 CCR § 1735 series) and the United States Pharmacopeia (USP) General Chapter <795> Pharmaceutical Compounding—Nonsterile Preparations. These standards ensure that compounded preparations are of acceptable strength, quality, and purity.

Non-sterile compounding typically involves creating oral liquids, topical creams, ointments, suppositories, and capsules. It must take place in a designated area of the pharmacy that is clean, well-lit, and maintained in a good state of repair, separate from dispensing and counseling areas.

Documentation: Master Formula and Compounding Record

Strict documentation is the backbone of safe compounding. Pharmacies must maintain two primary documents for every compounded preparation:

1. Master Formula Record (The "Recipe")

The Master Formula Record is the standardized "recipe" that provides step-by-step instructions on how to prepare the compounded drug. It ensures consistency from batch to batch. It must include:

• Active ingredients and excipients.
• Equipment required.
• Specific step-by-step compounding instructions.
• Expected yield.
• Quality control procedures and specifications (e.g., appearance, pH).
• Container-closure system requirements.
• Assigned Beyond-Use Date (BUD) criteria.

2. Compounding Record (The "Log")

The Compounding Record documents the actual execution of the Master Formula for a specific batch. It proves that the formula was followed. It must include:

• Name, strength, and dosage form of the preparation.
• Master Formula Record reference.
• Date and time of compounding.
• Identity of the personnel who compounded the preparation and the pharmacist who verified it.
• Vendor, lot numbers, and expiration dates of all ingredients used.
• Total quantity compounded.
• Assigned prescription number(s) and assigned BUD.
• Results of quality control procedures.

Creating comprehensive compounding records requires tremendous attention to detail. A missing lot number or expiration date for a single ingredient invalidates the entire record. California inspectors routinely audit these logs to verify that the math checks out, the equipment used was appropriate, and all safety checks were successfully documented.

Beyond-Use Dates (BUDs)

A Beyond-Use Date (BUD) is the date after which a compounded preparation shall not be used. It is fundamentally different from a manufacturer's expiration date. Expiration dates are determined through rigorous, long-term stability testing by manufacturers. BUDs are assigned by the pharmacist based on the physical and chemical stability of the specific compounded formulation, relying on literature and USP guidelines.

USP <795> provides default maximum BUDs for non-sterile compounded preparations, assuming they are packaged in tight, light-resistant containers and stored at controlled room temperature (unless otherwise specified). Pharmacists must assign the following BUDs, or the earliest expiration date of any ingredient used, whichever is shorter:

Note: These are maximum default BUDs. If a pharmacy has specific stability testing data (e.g., from an analytical laboratory) for their exact formulation and container, they may extend the BUD beyond these defaults, but they must have the documentation to prove it.

Determining the correct BUD demands a thorough understanding of physical chemistry and pharmacology. When compounding a preparation containing multiple active pharmaceutical ingredients (APIs), the interaction between these components must be scrutinized. The presence of water invariably reduces stability, making aqueous oral formulations the most perishable among non-sterile compounds. This emphasizes the importance of patient counseling, ensuring they understand proper storage and when to discard unused portions.

Quality Assurance, Equipment, and Training

Quality Assurance (QA): Pharmacies must have a written QA plan that defines how they monitor and evaluate compounding processes. This includes steps for investigating any compounding errors or adverse events reported by patients. The QA process must be fully documented and subjected to periodic review by the pharmacist-in-charge (PIC).

Equipment: All equipment (e.g., balances, trituration tools, homogenizers) must be appropriately designed, adequately sized, and suitably located to facilitate operation for its intended use. Balances must be calibrated regularly, and documentation of calibration must be maintained. Only specific pharmaceutical-grade mortars and pestles, typically made of glass, wedgwood, or porcelain, should be employed, depending on the abrasive nature of the ingredients.

Personnel Training: Any pharmacy personnel engaging in compounding must be thoroughly trained and evaluated. The pharmacist-in-charge (PIC) is responsible for ensuring that all staff have demonstrated competence in compounding techniques, pharmaceutical calculations, and the use of compounding equipment before they are allowed to prepare medications. This training must be documented and repeated at least annually. Such rigor guarantees that personnel are fully capable of reading a Master Formula and executing it accurately.