Botulinum or botulinum toxin (a neurotoxic protein) belongs to the group of active substances used for muscle relaxants. It is extracted from the toxin of the bacterium Clostridium Botulinum. The toxin blocks the release of the neurotransmitter acetylcholine from cholinergic nerve endings. This leads to a flaccid paralysis of the skeletal muscles. The botulinum is injected locally intramuscularly with a very fine needle at various points for the temporary treatment of facial wrinkles.