free tool
FDA Warning Letter Lookup
Search by company name or by the FDA reference number printed in the letter itself (e.g. “320-26-65”). Every result links to its Argus HQ summary and its original fda.gov source.
Frequently asked questions
Can I search by the FDA reference number printed on the letter?
Yes — enter the reference number as printed (e.g. "320-26-65"). The lookup also strips a leading "WL", "WL:", or "WL#" prefix automatically, so you can paste it exactly as it appears in the letter.
Can I search by company name instead?
Yes — the same search box matches by company name if what you enter doesn’t look like a reference number.
Where do the results link to?
Each result links to its Argus HQ summary page and, separately, its original fda.gov source so you can verify against the primary record.
Is this tool free?
Yes, no signup or card required, with a fair-use daily rate limit of 50 lookups per IP address.
What if no warning letter matches my search?
The tool tells you plainly that nothing was found, since our database covers FDA warning letters published since our ingestion window began — see data sources for coverage details, or search the full database instead.
Does Argus HQ track more than just warning letters?
Yes — Argus HQ monitors FDA warning letters, recalls, 483s, and approvals daily. See plans for ongoing per-company monitoring beyond this free lookup.