Side-by-side report
Relaxing Expression Lines With Neuromodulators
Neuromodulator, botulinum toxin and a handful of brand names can all describe the same injection, which is why the names confuse.
This guide lines up the terms in use for wrinkle-relaxing injections, using the American Society for Dermatologic Surgery's descriptions. It marks where a common claim goes further than the society does. Its overview of neuromodulators is the starting reference.
One treatment, several names
The American Society for Dermatologic Surgery says neuromodulators are wrinkle-relaxing injections of botulinum toxin that are used to treat wrinkles, frown lines and crow's feet. The society adds that they are sold under four commercial names. When two names sound different, check whether both point to this same injection before comparing prices or results.

Which lines the source names
Frown lines and crow's feet are the two areas named in that sentence. The society keeps a separate page on neuromodulators for crow's feet and another on frown lines and forehead furrowed brows.
Where claims run past the source
The source calls these injections wrinkle-relaxing. A claim that they fill, lift or resurface skin describes a different kind of treatment. A claim that one commercial name works better than another is also outside the sentence above.
A plain verdict on neuromodulators
According to the source, neuromodulators relax wrinkles, and the named areas are frown lines and crow's feet. The society's page on neuromodulators for wrinkles is a practical next read before a consultation.