Compounding explained
Research grade.
Pharmaceutical grade.
What’s the difference?
Look beyond the label.
Understand the intended use.
The words “pharmaceutical grade” alone do not establish suitability for use in a medication. For medicine preparation, the source, applicable standards and supporting quality documentation matter. [1]
See the comparisonFor laboratory
research
“Research use only” is not permission to use a material as a medicine.
For medicine
preparation
Verify the relevant quality standards and suitability for the intended preparation.
At a glance
Purpose, standards
and evidence.
The useful comparison is between materials sold for research and ingredients qualified for medicine preparation. The words “pharmaceutical grade” alone do not establish all of the requirements below.
| What to consider | Research-use materials | Ingredients for medicines |
|---|---|---|
| Intended use | Labeled for research. Do not use a research-only material to replace a prescribed medicine. | Selected for a specific preparation, with applicable quality and compounding requirements. |
| Quality evidence | A research label or advertised purity percentage does not establish suitability for patient use. | Relevant specifications, supplier information and testing documentation, including applicable USP or NF standards. |
| FDA approval | A research label does not confer drug approval. | Ingredient quality does not make a compounded medicine FDA-approved. |
Read FDA’s guidance on ingredient sourcing, its warning about products sold falsely for research purposes, and its explanation of compounded drug approval status.
What quality means
What ingredient
quality involves.
Standards cover several attributes
USP monographs describe tests and acceptance criteria for attributes such as identity, strength and impurities. A single purity result is only part of that picture. [2]
Documentation needs context
FDA urges compounders to understand who supplies their ingredients and what quality testing is performed. A certificate of analysis is part of the documentation; supplier traceability and suitability for the intended use also matter. [1]
The finished preparation matters, too
Ingredient quality is one part of medicine quality. Compounding conditions, the amount of active ingredient and contamination control also matter. Compounded medicines are not reviewed by FDA for safety, effectiveness or quality before marketing. [4]
Using this guide
Common questions.
Does “USP grade” mean FDA-approved?
No. Conformance with a quality standard and approval of a finished drug are different things. Using an ingredient that meets a USP standard does not make a compounded prescription FDA-approved. See FDA’s explanation.
Can high purity make a research-only product suitable for treatment?
A purity claim alone is not enough. FDA warns against buying unapproved GLP-1 products falsely sold for research or labeled as not for human consumption because their quality is unknown and they may be harmful. Discuss treatment with your clinician and pharmacist. Read FDA’s warning.
Can any high-quality ingredient be used in compounding?
No. Ingredient quality and eligibility for compounding are separate checks. FDA describes conditions for bulk drug substances used under section 503A, including applicable standards, sourcing and certificates of analysis. Ask the pharmacy about the specific preparation. See FDA’s 503A overview.
What should I ask my pharmacy?
Ask who prepared the medicine, what standards apply to its ingredients and preparation, and whom to contact with questions. Confirm the prescription label, storage instructions and beyond-use date. Learn about beyond-use dating.
Sources & further reading
- FDA: Q7 — Quality, Testing and Traceability of Active Pharmaceutical Ingredients
- USP: Key Components of a USP Monograph (PDF)
- FDA: Concerns with Unapproved GLP-1 Drugs — research-use labeling
- FDA: Understanding the Risks of Compounded Drugs
- FDA: Bulk Drug Substances Used in Compounding Under Section 503A
This overview does not verify a particular supplier, ingredient or product. Your pharmacist can address questions about a specific prescription.