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CATEGORY: SAFETY SURVEILLANCE
FDA Warning Letter
A formal communication from the FDA to a manufacturer indicating significant regulatory violations. Warning letters typically cite GMP deficiencies, labeling violations, or marketing of unapproved devices. They are publicly posted on the FDA website.
Last reviewed 2026-08-05 · Reviewed by MedFlux Editorial Board · Editorial policy
WHEN IT APPLIES
An FDA warning letter notifies a firm of significant violations and requests prompt corrective action; it is publicly posted and signals elevated compliance risk.
PROCESS / STEPS
- Parse cited regulations and products.
- Contain product risk if needed.
- Execute systemic CAPA and communicate to FDA.
- Verify sustainability before close-out.
EXAMPLES
- QS regulation failures and MDR reporting gaps are common warning-letter themes for device firms.
RELATED GUIDES & TOOLS
SOURCES
Track regulatory signals related to FDA Warning Letter across 27 authorities in real time.
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