What rules govern the exact wording on a drug label?

Several layers. OTC Drug Facts labels use fixed titles, headings and subheadings set by 21 CFR 201.66. Firms may swap certain listed terms only if the swap doesn't change the established meaning. Required statements must be in English. And under section 502 of the federal Food, Drug, and Cosmetic Act, labeling that's false or misleading in any particular makes a drug misbranded.

This page is general information, not legal or regulatory advice.

Fixed headings on OTC labels

21 CFR 201.66(c) sets the required title and headings for Drug Facts labeling, in order, with set wording such as "Uses", "Warnings" and "Directions" (the rule also allows "Use" and "Warning"), plus bold subheadings for specific warnings. Our reasoning: because every OTC label uses the same signposts, readers can learn where to look.

Where wording can flex

21 CFR 201.66(f) lets firms use terms listed in 21 CFR 330.1 interchangeably, provided the swap doesn't alter the meaning set by the monograph or regulation. So meaning is the test, not exact spelling. A correctly spelled wrong word fails that test even though every letter is right.

Prescription and patient labeling

Many prescription labels follow the content and format rules in 21 CFR 201.57. Medication Guides must be in nontechnical, understandable English and must not conflict with the approved professional labeling (21 CFR 208.20). See Medication Guides and IFUs.

Language and prominence

Required statements must be in English, and in every other language the label uses (21 CFR 201.15(c)). Required text also has to be prominent enough to read, so crowding or tiny type can be a problem on its own (21 CFR 201.15(a)).

What this means for a reviewer

The rules fix where things go and what they must say. They can't stop a real word from landing in the wrong slot. That's a reading job. See examples on the case index, including the case where an FDA DailyMed label said "indicted" instead of "indicated" (indicted→indicated).

Sources

• eCFR: 21 CFR 201.66
• eCFR: 21 CFR 330.1
• eCFR: 21 CFR 201.57
• eCFR: 21 CFR 208.20
• eCFR: 21 CFR 201.15
• LII: 21 U.S. Code § 352 - Misbranded drugs and devices

Last reviewed: October 14, 2026

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Are OTC drug label headings fixed by the FDA?

Yes. 21 CFR 201.66 sets the Drug Facts title, headings and subheadings and the order they appear in.

Can a company change the wording on an OTC label?

Only within limits. Listed terms can be swapped if the swap doesn't change the established meaning.

Is a wrong word on a label a legal problem?

It can be. Labeling that's false or misleading in any particular makes a drug misbranded under section 502 of the federal Food, Drug, and Cosmetic Act.