Alluzience: ready-to-use botulinum toxin
A liquid botulinum toxin type A preparation supplied ready to use, removing the reconstitution step but not the unit-system problem.
Preparations
Reference notes on the botulinum toxin preparations licensed in the UK — what distinguishes them, why their units are not interchangeable, and where the official product information lives.
Several botulinum toxin type A preparations are licensed in the UK. They are not variants of one product: they differ in formulation, in the complexing proteins they carry or lack, in storage requirements, and — critically — in the unit system used to measure them.
No dosing information appears anywhere in this section. Dose, injection sites, dilution and treatment interval are set by each manufacturer and published in that product’s Summary of Product Characteristics. Every page here links to the official SmPC on the electronic medicines compendium instead of restating it.
All of these products are prescription-only medicines in the UK. The pages below describe what each preparation is, for readers who want to understand the differences between them.
Azzalure and Speywood units (abobotulinumtoxinA)
The preparation measured in Speywood units — a unit system unique to abobotulinumtoxinA products and convertible to no other.
Bocouture units and incobotulinumtoxinA
The Merz preparation, free of complexing proteins and licensed in the UK for upper facial lines — supplied in 50 and 100 unit vials with its own unit …
Botox (onabotulinumtoxinA) and Allergan Units
The Allergan preparation of botulinum toxin type A, measured in Allergan Units — the product whose brand name became the generic term for the whole …
Botulinum toxin units are not interchangeable
Each preparation is measured by its own manufacturer's assay, no conversion between systems is licensed, and volume markings on a syringe are not …