Aperthid is a term that refers to a class of compounds derived from the neurotoxin produced by the bacterium Clostridium botulinum. These compounds are characterized by their ability to inhibit the release of neurotransmitters at the neuromuscular junction, leading to muscle paralysis. Aperthids are studied for their potential therapeutic applications, particularly in treating conditions related to muscle spasticity and certain neurological disorders. However, their use is highly regulated due to the associated health risks.