ergotamine

/ɜrˈɡɑtəmin/
noun
  1. A chemical from the ergot fungus, used in medicines to treat migraine headaches by narrowing blood vessels in the brain.
    • Ergotamine works best when taken at the first sign of a headache.
    • Her doctor prescribed ergotamine to stop the throbbing pain of her migraines.
    • Some patients experience nausea as a side effect of ergotamine.