Ergot alkaloids are a group of compounds derived from the ergot fungus, which typically grows on rye and other grains. These alkaloids have a complex chemical structure and can affect the nervous system, leading to various physiological effects. They are known for their historical use in medicine, particularly in treating migraines and inducing labor. In addition to their medicinal properties, ergot alkaloids can also be toxic. Consumption of contaminated grains can lead to ergotism, a condition characterized by symptoms such as hallucinations, convulsions, and gangrene. Due to their potent effects, these compounds are carefully regulated in pharmaceutical applications.