Does the FDA issue warning letters for drug labeling errors?
Yes, labeling problems can be part of an FDA warning letter. The FDA says a warning letter identifies significant violations, such as problems with claims for what a product can do or incorrect directions for use. Under federal law, a drug is misbranded if its labeling is false or misleading in any particular, or lacks adequate directions for use and adequate warnings.
This page is general information, not legal or regulatory advice.
What a warning letter is
The FDA describes a warning letter as its notice to a company or person when it finds what it believes are significant violations. The letter names the concerns and asks for a response within a set time. The firm can answer with plans for correction, or with its reasons if it disagrees. The FDA publishes warning letters on its website.
The labeling hooks in the law
The misbranding section of the federal Food, Drug, and Cosmetic Act (section 502) covers labeling that is:
- False or misleading in any particular.
- Missing adequate directions for use.
- Missing adequate warnings, for example against unsafe dosage or use by children where that may be dangerous.
Those are the grounds a wording error would fall under if it changed what a warning or direction tells the reader.
Where a wrong word fits
A correctly spelled wrong word in a warning or direction is exactly the kind of slip that can make labeling misleading or leave a direction inadequate. Real examples are on the case index. If you find one on your own label, see found a wrong word on a released label.
Sources
- FDA: About Warning and Close-Out Letters
- FDA: Warning Letters
- LII: 21 U.S. Code § 352 - Misbranded drugs and devices
Last reviewed: October 14, 2026
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FAQ
Does the FDA issue warning letters for labeling errors?
It can. The FDA says warning letters identify significant violations, such as problems with product claims or incorrect directions for use.
What makes a drug misbranded?
Among other things, labeling that is false or misleading in any particular, or that lacks adequate directions for use or adequate warnings.
Can one wrong word make a label misbranded?
Whether a given error does is a call for your regulatory team. A wrong word that makes a warning or direction misleading or inadequate falls under the same rules.