United States Pharmacopeia-National Formulary (USP25 NF20)

What this is: Contains standards for medicines, dosage forms, drug substances, excipients, biologics, compounded preparations, medical devices, dietary supplements, and other therapeutics. The monographs provide specifications for identity, strength, quality, purity, packaging, and labeling for substances and dosage forms. Chapters provide clear, step-by-step guidance for assays, tests, and procedures.