Botox, aka Onabotulinumtoxin A, is an example of a chemical compound used in selective denervation. It is isolated from...
Dysport
Abobotulinumtoxin A, is also a chemical denervating compound that has the same mechanism of action as Botox. It is described as having a faster onset than Botox (1-2 vs. 3-4 days), and having a larger affected area. If you are addressing a large problem area, you may consider Dysport over Botox, and vice versa.