Botulinum toxin type A is an injectable neurotoxin, better known under brand names such as Dysport® and Jeuveau®. Neurotoxin treatments are the most popular single cosmetic procedure in the U.S. and are mainly used to smooth dynamic wrinkles, or those wrinkles that form as a result of facial movements like frowning, squinting, smiling, and other expressions we tend to make day after day. Treatment works by blocking nerve impulses to the muscles, causing them to relax. As a result, your expressions soften and the dynamic wrinkles are greatly reduced. This leads to a rejuvenated and youthful appearance.