Botulinum Toxin Unit
A standardised measurement of potency used to dose botulinum toxin products; units are not interchangeable across brands.
Full Definition
Botulinum toxin unit refers to the biological activity measurement assigned to botulinum toxin preparations, calibrated against a lethal-dose assay in mice. Crucially for editors, units differ between manufacturers—Allergan's Botox, Galderma's Dysport, and Merz's Xeomin use non-equivalent unit scales. Clinical documents must specify both the product name and the unit quantity to avoid dangerous misinterpretation. Editors should flag any text that implies unit equivalence across brands. The abbreviation 'U' is preferred over 'units' in clinical notation.
Usage
Usage note: Always pair with the brand name in clinical copy; never convert units between brands without explicit equivalency data.
In Context
- "The protocol specified 20 U of onabotulinumtoxinA, a dose that cannot be directly converted to abobotulinumtoxinA without adjustment." — Clinical treatment protocol
- "Editors must ensure the botulinum toxin unit count is accompanied by the proprietary product name throughout the manuscript." — Peer-review manuscript style guide