Xeomin is a neuromuscular blocking agent, similar to Botox, used to temporarily relax muscles and reduce the appearance of wrinkles and lines, according to the American Academy of Facial Esthetics. It's FDA-approved for treating conditions like cervical dystonia, blepharospasm, and moderate to severe frown lines. Xeomin contains the active ingredient incobotulinumtoxinA, a purified botulinum toxin, which blocks nerve signals to muscles, preventing them from contracting.