Which organization sets official drug purity and dosage standards used by pharmacists in the United States?

• A. United States Pharmacopeia (USP)
• B. FDA
• C. World Health Organization
• D. Drug Enforcement Agencies

Answer: (A)

Standards for drug purity and dosage used by pharmacists in the United States come from the United States Pharmacopeia. This organization publishes the United States Pharmacopeia and National Formulary (USP-NF), which provides official monographs defining identity, strength, quality, and purity for drugs and for many excipients, along with validated testing methods. Pharmacists and manufacturers rely on these USP standards as the authoritative reference for what constitutes a compliant drug product, and regulatory agencies recognize these standards as official quality benchmarks.

The FDA is a regulatory body that enforces laws and approves drugs, but it does not publish the compendium that sets the official purity and dosage standards. The World Health Organization issues international guidelines, not U.S.-specific standards. The Drug Enforcement Administration focuses on enforcement related to controlled substances rather than establishing clinical quality standards.