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21 CFR: FDA regulations

1,363 sections of Title 21 for drugs, biologics, devices and clinical research. Each one comes with the Form 483 observations and warning letters that cite it, and the FDA guidance that explains it.

Data as of 31 Oct 2026 Official Title 21 on eCFR
Independent copy, not an official legal edition. 21 CFR is a U.S. Government work in the public domain. Inspection data comes from the FDA Data Dashboard, which does not include every inspection; an observation is not a final finding of a violation. Compliome is not affiliated with or endorsed by FDA. Not legal advice.

General, records and electronic signatures

Clinical research and human subjects

Drugs: labelling, GMP and applications

Biologics, blood and tissues

Medical devices