Botox or Dysport for crows feet?

I have been injecting Botox for aesthetic reasons since 1991 and Dysport for well over twenty years, so I have quite extensive real-world experience using these neuromodulators (as well as others) for the treatment of glabella frown lines, forehead worry lines and crow's feet. In general, when the appropriate amounts and concentrations of each are used for these purposes, the results are pretty much the same and the duration of the results likewise pretty much the same. However, for best results, you would be wise to make sure that you consult with an experienced, board certified cosmetic dermatologist, since outcomes are very much dependent upon the injector. Hope this helps and best of luck.

Both Botox and Dysport are FDA-approved for the treatment of crow's feet (the lines that appear around the eyes when smiling or squinting) and both have been shown to be effective. They work by temporarily paralyzing the muscle activity that leads to these lines.
Botox and Dysport have a similar mechanism of action, but there are some differences between the two:
1. Onset: Dysport may start working a bit faster than Botox. Dysport usually starts showing effects within 2-3 days, while Botox might take 3-5 days.
2. Diffusion: Dysport tends to spread or diffuse more, covering a broader area after injection. This can be beneficial when treating larger areas, but it might also increase the risk of unwanted effects if it spreads to nearby muscles.
3. Unit strength: They are not interchangeable on a unit by unit basis. In other words, the number of units needed for a treatment might differ between Botox and Dysport.
4. Longevity: Both treatments typically last between 3-4 months, but some studies suggest that Botox might last slightly longer.
It's important to note that individual results can vary, and the best choice depends on the specific needs and circumstances of the patient. The decision should be made in consultation with a knowledgeable healthcare provider.