Ergoline

Ergoline is a chemical compound whose structural skeleton is contained in a diverse range of alkaloids including a few psychedelic drugs (e.g. ergine and LSD). Ergoline derivatives are used clinically for the purpose of vasoconstriction (5-HT₁ receptor agonists—ergotamine) and in the treatment of migraines (used with caffeine) and Parkinson's disease. Some ergoline alkaloids found in ergot fungi are implicated in the condition ergotism, which causes convulsive and gangrenous symptoms.