BOTOX 100U/vial 150U/vial Its active ingredient is botulinum toxin type A. The most popular use of Botox is for cosmetic purposes – mainly for the treatment of wrinkles. Botox is injected by medical professionals into areas of the face, for which the treatment is required. It works by temporarily paralyzing the muscles under the skin, smoothing out wrinkles. Botox (botulinum) for cosmetic use.