BOTOX® Cosmetic is commonly used to reduce or eliminate the appearance of facial wrinkles. The products are injected under the skin into areas surrounding the eyes and forehead to smooth crow's feet and frown and worry lines. Made from a purified protein, BOTOX® injections block nerve impulses, temporarily weakening muscles to relax wrinkles and give the face a rejuvenated look. BOTOX® may also be useful for migraine headaches and eye and muscle spasms. The effect of each treatment can last up to four months before results diminish.