The required warning
Updated
On this page8
For all fluoride dentifrice products
Gel, paste and powder. Under the heading "Warning": "Keep out of reach of children under 6 years of age." highlighted in bold type, then "If more than used for brushing is accidentally swallowed, get medical help or contact a Poison Control Center right away."
The bold is part of the requirement
The regulation specifies that the first sentence is highlighted in bold type. That is a typographic instruction inside a labeling rule, and it is the kind of detail a designer will quietly normalize away.
Under 6, specifically
Not children generally. The dentifrice warning names an age, which is narrower than the usual keep-out-of-reach language and is easy to get wrong by borrowing another product’s wording.
Rinses and treatment gels differ
For fluoride rinse and preventive treatment gel products the warning is "Keep out of reach of children." in bold, then the same accidental swallowing sentence with brushing or rinsing selected as appropriate. No age in that one.
These replace the general warnings
The regulation says they shall be used in place of the general warning statements required by 21 CFR 330.1(g). So carrying both is not belt and braces, it is the wrong label.
And they sit inside Drug Facts
An over-the-counter drug carries the Drug Facts panel with its headings, order and typography. On a small tube or a travel bottle that is a real layout constraint and it has to be designed for rather than squeezed in.
Which is another argument for classifying first
A cosmetic tooth powder needs an ingredient declaration and no panel. Discovering the drug classification after artwork is approved means rebuilding the label around a structure nobody allowed space for.