What Is Pharmaceutical Compounding?
Pharmaceutical compounding is the process of creating a customized medication for an individual patient when a commercially available drug does not meet their specific needs. A licensed pharmacist or physician combines, mixes, or alters ingredients to create a medication tailored to the patient's requirements — such as a different strength, dosage form, or the removal of a non-essential ingredient like a dye or preservative.
Compounding has been practiced for centuries and remains an essential part of modern healthcare, particularly for patients with unique clinical needs, allergies, or conditions requiring specialized formulations. Today, compounding is widely used in hormone therapy, peptide medicine, pain management, dermatology, veterinary medicine, and pediatrics.
When is compounding appropriate?
- ✓Patient requires a dosage form not commercially available (e.g., topical instead of oral)
- ✓Patient has an allergy to an inactive ingredient in the commercial product
- ✓Patient requires a strength not commercially available
- ✓Commercial product is on FDA drug shortage list
- ✓Patient requires a combination of medications not available commercially
- ✓Pediatric patient requires a lower dose or more palatable formulation
503A vs. 503B: The Critical Distinction
The 503A/503B distinction is the most important regulatory framework for providers prescribing compounded medications. Understanding this distinction affects how you order, what you can order, and what regulatory standards apply.
| Dimension | 503A Pharmacy | 503B Outsourcing Facility |
|---|---|---|
| Regulatory oversight | State board of pharmacy (primary) | FDA + state board of pharmacy |
| Prescription requirement | Patient-specific prescription required | Can compound without patient-specific Rx for office use |
| Volume | Limited quantities for individual patients | Large-scale production for healthcare facilities |
| Quality standards | USP <795>, <797>, <800> | cGMP (similar to pharmaceutical manufacturers) |
| FDA registration | Not required | Required — FDA-registered and inspected |
| Accreditation | PCAB or ACHC (voluntary) | FDA inspection (mandatory) |
| Common use | Individual patient prescriptions | Office-use stock, hospital formularies |
| Examples | Most local and mail-order compounding pharmacies | Empower Pharmacy, Olympia Pharmacy, Fagron Sterile Services |
Sterile vs. Non-Sterile Compounding
The sterile/non-sterile distinction determines the level of facility requirements, personnel training, and quality standards required for a compounding preparation.
Sterile compounding involves the preparation of medications that must be free from microorganisms and particulate matter — including injectables, IV preparations, eye drops, and certain nasal sprays. Sterile compounding requires specialized cleanroom facilities, laminar airflow hoods, and rigorous environmental monitoring. Must comply with USP <797>.
Non-sterile compounding involves the preparation of medications that do not require sterility — such as topical creams, gels, capsules, troches, and oral suspensions. Non-sterile compounding requires a clean, controlled environment but not a sterile cleanroom. Must comply with USP <795>.
Why this matters for providers: When ordering injectable medications (peptides, hormones, vitamins), always verify that the pharmacy has sterile compounding capabilities and USP <797> compliance. Ordering injectables from a non-sterile pharmacy is a serious patient safety risk.
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Get StartedUSP Standards: 795, 797, and 800
The United States Pharmacopeia (USP) establishes the quality standards that compounding pharmacies must follow. Three chapters are most relevant for providers prescribing compounded medications:
| USP Chapter | Scope | Key Requirements | Who It Applies To |
|---|---|---|---|
| USP <795> | Non-sterile compounding | Beyond-use dating, labeling, quality controls, environmental monitoring | All pharmacies doing non-sterile compounding |
| USP <797> | Sterile compounding | Cleanroom requirements, personnel training, environmental monitoring, sterility testing, BUDs | All pharmacies doing sterile compounding (injectables, eye drops, IV) |
| USP <800> | Hazardous drug handling | Facility requirements, PPE, containment, disposal, personnel training | Any facility handling hazardous drugs (chemo, certain hormones, some antifungals) |
| USP <1> through <1999> | General standards | Testing methods, reference standards, general information | All pharmacies and pharmaceutical manufacturers |
PCAB and ACHC Accreditation: What They Mean
Pharmacy accreditation is a voluntary quality designation that indicates a compounding pharmacy has been independently evaluated against rigorous standards. While not legally required in most states, accreditation is a strong indicator of pharmacy quality and is increasingly expected by healthcare providers.
PCAB (Pharmacy Compounding Accreditation Board) is the most recognized accreditation specifically for compounding pharmacies. PCAB-accredited pharmacies undergo regular on-site inspections and must demonstrate adherence to USP standards, proper documentation, and quality assurance processes. PCAB is widely considered the gold standard for compounding accreditation.
ACHC (Accreditation Commission for Health Care) offers broader healthcare accreditation including compounding pharmacy. ACHC accreditation is also recognized as an indicator of quality.
How to verify accreditation:
- ✓PCAB accreditation: verify at pcab.org — search by pharmacy name
- ✓ACHC accreditation: verify at achc.org — search by organization name
- ✓FDA 503B registration: verify at accessdata.fda.gov/scripts/fdcc/?set=outsourcingfacilities
- ✓State pharmacy license: verify at your state board of pharmacy website
- ✓NABP e-Profile: verify at nabp.pharmacy
How to Evaluate a Compounding Pharmacy: 7-Step Checklist
Before establishing a relationship with a compounding pharmacy, healthcare providers should conduct thorough due diligence. This 7-step checklist covers the essential verification steps:
- ✓State licensure — Verify active license with the relevant state board of pharmacy. Check for any disciplinary actions or license restrictions.
- ✓NABP e-Profile — Check the pharmacy's NABP e-Profile at nabp.pharmacy for compliance history.
- ✓PCAB or ACHC accreditation — Verify accreditation status at pcab.org or achc.org. Accreditation indicates independent quality inspection.
- ✓FDA registration (503B only) — For outsourcing facilities, verify FDA registration and review inspection history at accessdata.fda.gov.
- ✓USP compliance documentation — Request documentation of USP <795> and <797> compliance. For sterile preparations, request environmental monitoring data and sterility testing results.
- ✓Certificates of analysis — Request COAs for the specific preparations you plan to order. COAs should confirm identity, potency, purity, and sterility from an independent laboratory.
- ✓Shipping capabilities — Confirm the pharmacy is licensed to ship to your state and has appropriate cold-chain shipping for temperature-sensitive preparations.
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Get StartedFDA Compliance and the Regulatory Landscape
The FDA's oversight of compounding pharmacy has increased significantly since the 2012 New England Compounding Center (NECC) meningitis outbreak that killed 64 patients. The Drug Quality and Security Act (DQSA) of 2013 created the 503B outsourcing facility category and gave the FDA clearer authority over large-scale compounding.
Key FDA compliance areas for providers:
Drug shortage compounding: 503A pharmacies may compound copies of FDA-approved drugs when the drug is on the FDA shortage list. Verify current shortage status at accessdata.fda.gov/scripts/drugshortages/ before prescribing compounded versions of commercial drugs.
Bulk drug substance lists: The FDA maintains lists of bulk drug substances that may (Category 1) and may not (Category 2) be used in compounding. Verify the status of any bulk drug substance before prescribing.
FDA warning letters: The FDA publishes warning letters to compounding pharmacies that violate regulations. Review FDA warning letters at fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters before establishing a relationship with any pharmacy.