Mandatory, legally enforceable requirements.
The USP–NF is a combination of two official compendia: the United States Pharmacopeia (USP) and the National Formulary (NF). This combined publication contains legally enforceable standards for a wide range of products, including medicines, dosage forms, drug substances, excipients, biologics, compounded preparations, medical devices, dietary supplements, and other therapeutics. usp 39 pdf
Focuses on excipients, which are the inactive ingredients used to formulate medications (e.g., binders, colorants, preservatives). Core Content Found in the USP 39 PDF Mandatory, legally enforceable requirements