BOTOX® is the commercial trade name for Botulinum Toxin Type A, which is made from Clostridium Botulinum, a bacterium found in nature. In a clinical setting, BOTOX® is used in small doses to treat wrinkles, underarm sweating, chronic migraine, cervical dystonia, strabismus, blepharospasm, and overactive bladder. When injected into muscles, Botulinum Toxin affects the local area. It causes weakness of the muscle around the injection site by blocking transmission from the nerve endings to the muscle fibres.