Botox injections are shots that use a toxin to prevent a muscle from moving for a limited time. These shots are often used to smooth wrinkles on the face. They're also used to treat neck spasms, sweating, overactive bladder, lazy eye and other conditions. Botox shots also may help prevent migraine.

The medicine in Botox injections is made from the same toxin that causes a type of food poisoning called botulism. But the forms of purified botulinum toxin used by licensed health care providers meet medical control standards.