Cicutoxin is a potent neurotoxin found in plants of the genus Cicuta, commonly known as water hemlock. This toxin affects the central nervous system and can lead to severe symptoms, including seizures and respiratory failure. It is considered one of the most toxic plant substances and can be fatal if ingested. The toxin works by blocking neurotransmitter receptors, disrupting normal nerve function. Symptoms of cicutoxin poisoning can appear within minutes of ingestion, making it crucial to seek immediate medical attention. Due to its high toxicity, Cicuta species are often avoided in herbal medicine and are considered dangerous to humans and animals alike.