BOTOX® Cosmetic is the most popular anti-wrinkle injection in the United States. Last year, in fact, it outpaced all other cosmetic treatments and surgeries with more than 6 million treatments, according to the annual report by the American Society of Plastic Surgeons. However, BOTOX® was originally developed for medical use, and has been used for a wide variety of treatments since its original FDA approval in 1989 for the treatment of eyelid spasms. It was not approved for cosmetic use...