A neurotoxic protein produced by the bacterium Clostridium Botulinum. When administered, interferes the neurotransmitter and block the release of acetylcholine that weakens and or paralyzes the muscles of where it is being administered to. Botulinum toxin is used to treat various conditions but not limited to. These include excessive sweating (hyperhidrosis), excessive muscle contraction (dystonia), blepharospasm, chronic migraine, overactive bladder, and for cosmetic purposes. Botulinum toxin type A is most commonly used and is widely known under brands such as Botox, Dysport, and Xeomin. In cosmetic applications, it is considered a safe and effective method and typically a choice for wrinkle reduction and the correction of fine lines to dermatological applications.