24 Jul 2024 --- Merz Aesthetics gains FDA approval for Xeomin (incobotulinumtoxinA) as the “first and only neurotoxin” approved for the treatment of forehead lines, frown lines and crow’s feet. “Neurotoxins, such as Xeomin, are prescription medications that block the release of chemicals that cause these muscle contractions so frown lines are softened,” says the company.