Botox® Cosmetic (onabotulinumtoxinA) 50 Units by Allergan/AbbVie is a prescription injectable treatment supplied in a single-use vial for the temporary improvement of moderate to severe facial lines, including forehead lines, crow’s feet, and frown lines. Designed for intramuscular use by licensed professionals, this refrigerated neurotoxin must be reconstituted with sterile saline before administration and used within 24 hours.