Anti-wrinkle Injection (BoNTA) is an incob*t*linumtox*A neuro-muscular blocker that inhibits neurotransmitter function. It blocks the transmission of acetylcholine from the neuron to the muscle and therefore impedes muscle contraction. This medicine treats muscle spasms and arm stiffness, severe spasms in the neck muscles, and muscle stiffness in the elbows, wrists, fingers, ankles, or toes.