Drugs

A drug is a drug product keyed by its 11-digit product NDC. Each record combines the FDA National Drug Code directory listing with RxNorm-derived classification, pharmacology, and clinical attributes. Field by field: the Drug data dictionary.

Identifiers — the NDC forms and RxNorm concept that reference a product.
Matching — resolving by identifier, name, or structured attributes.

Fetching a drug#

Once you have an NDC, Get drug by NDC returns the full record — the FDA listing plus the RxNorm classification, pharmacology, and clinical attribute lists.