Botox is a prescription medicine that is injected into muscles to improve the look of moderate to severe lines and wrinkles. It works by blocking the nerve impulses that cause muscles to contract, causing the muscles to relax and the wrinkles to soften. When injected into the muscles that cause wrinkles, Botox prevents those muscles from contracting, which helps to smooth out the appearance of the wrinkles. It is important to note that Botox does not permanently remove wrinkles, but rather temporarily improves their appearance. The effects of Botox typically last for 3-4 months, at which point the treatment can be repeated to maintain the desired results.