Cosmetic or drug

The warnings, verbatim

Updated October 2026

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The three that always apply The kidney one surprises people Two more for an aerosol Which is a reason the format matters The direction is prescribed too All of it in the Drug Facts format Which a small container makes hard References

These are printed in the regulation and reproduced, not paraphrased.

The three that always apply

Under the heading "Warnings": "Do not use on broken skin". "Stop use if rash or irritation occurs". "Ask a doctor before use if you have kidney disease". Short, specific, and not yours to reword.

The kidney one surprises people

It is in the monograph and it applies to every antiperspirant drug product, not only to a particular active. A label missing it is incomplete however carefully the rest was assembled.

Two more for an aerosol

A statement under "When using this product" to keep away from face and mouth to avoid breathing it, with a bullet as defined in 21 CFR 201.66(b)(4); and the warning required by 21 CFR 369.21 for drugs in dispensers pressurized by gaseous propellants.

Which is a reason the format matters

Choosing an aerosol adds two required statements and a cross-reference to another part of the chapter. A pump spray is a different proposition from a pressurized one in labeling terms as well as in filling.

The direction is prescribed too

Under "Directions": "apply to underarms only". One phrase, and the monograph gives it rather than leaving you to describe the use.

All of it in the Drug Facts format

An over-the-counter drug label carries the Drug Facts panel under 21 CFR 201.66, with its headings, order and typography. That is a substantial piece of label real estate and it has to be designed for from the start.

Which a small container makes hard

A 59 mL jar or a 65 mL tube has very little panel, and Drug Facts is not optional on the drug side. That is the strongest practical argument for staying on the cosmetic side where the product genuinely is a deodorant.

References

21 CFR 350.50, Labeling of antiperspirant drug products. Paragraph (a) requires the product to be identified as an antiperspirant; (b)(1) gives the Uses statement as a choice of one of three verbs and one of five nouns; (b)(3) and (b)(4) tie duration and "extra effective" claims to 20 percent and 30 percent sweat reduction; (c) sets four verbatim warnings; (d) sets the direction "apply to underarms only". law.cornell.edu

21 CFR 369.21, the warning required for drugs in dispensers pressurized by gaseous propellants, cross-referenced by 21 CFR 350.50(c)(4)(ii) for aerosol antiperspirants. law.cornell.edu

21 CFR 201.66, the Drug Facts format for over-the-counter drug labeling, which 21 CFR 350.50 cross-references for the definition of a bullet and which sets the panel an antiperspirant label has to carry. law.cornell.edu

Written from the federal monograph, not from a formulation bench. Whether a given product is a cosmetic or a drug turns on its ingredients and its claims, and that is a determination with consequences; nothing here substitutes for getting it right for a specific formula and label.