FDA jurisdiction
What makes a chemical or compound a 'drug' in the eyes of the law?
Plain English first, then the primary source. Education, not legal advice.
Interpretation
In short: intended use turns a substance into a drug. Chemistry alone does not settle the category.
Plain English
The Federal Food, Drug, and Cosmetic Act defines a drug in part as an article intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease, or an article (other than food) intended to affect the structure or function of the body. This definition turns on intended use, not on chemical identity alone.
This means the same compound can be a research chemical in one context and an unapproved new drug in another, depending on how it is presented and sold. A substance with no approved medical use can still meet the legal definition of a drug if someone markets it for a disease-related purpose.
Once something meets the drug definition, a wide range of FD&C Act requirements can attach, including new drug approval, manufacturing standards, and labeling rules.
Why it matters
- This is the foundational hook for almost all FDA jurisdiction over RUO chemicals sold with health-related claims.
- Sellers cannot avoid drug status purely through disclaimers if their actual marketing suggests a therapeutic use.
Where the answer becomes fact-specific
The Foundation does not manufacture legal conclusions. These points change the analysis and may require qualified regulatory counsel.
- Structure/function claims versus disease claims can change the analysis significantly, and food, cosmetic, and dietary supplement categories have their own overlapping definitions.
View the source
- 21 U.S.C. 321(g), definition of drug, 21 U.S.C. § 321(g)