BOTOX is derived from the botulinum toxin, a protein and neurotoxin that causes muscles to relax. It is that property of BOTOX that is beneficial in its use as an aesthetic treatment. When the injected muscles in the face relax, the associated wrinkles tend to soften, producing a pleasant “youthful” appearance on the face. Dysport works similarly. The two are like Coca Cola vs Pepsi. Dysport tends to have a faster onset (3 days) vs Botox (7 days).