Botulinum toxin, commercially known as Botox™, has been safely and successfully used in many patients for the treatment of facial wrinkles over the past decade. The toxin works by temporarily weakening the treated muscles thereby preventing the formation and exaggeration of expression type wrinkles, such as frown lines on forehead and between the eyes as well as crow's feet. The improvement of wrinkles does not appear until 3-4 days after the injection. On average, the beneficial effect lasts 3-5 months. Injections may be repeated safely as often as desired.