chirontherainbowbridge
this article doesn't actually tell you how to stop a stroke, but it does tell you how to recognize one, and thereby save a life.
Dr.'s Christopher and Schultz would probably suggest some cayenne, as well. I used to keep a small bottle of tabasco sauce around just in case... probably good to have in the car's glove compartment.
http://www.relfe.com/wp/health/identify-stroke-symptoms-save-life/
Chiron