I have no medical credentials but after reading the very informative posts 0n heat stroke thought I would share a true event with you. I have a male friend, early 50's, good shape, cholesterol good about 160, stress test less than a year ago - everything looked fine. Started feeling bad one night thinking indigestion or something. His wife called 911 and based on the symptons, they told her to give him 4 asprin. Once he got to the hospital, they found nearly 100% blockage in a heart artery and were able to fix it with a stint. The doctor told the wife that they call this type of heart attack the widow maker and that the asprin most likely saved his life by allowing more blood to flow past the blockage. Now my wife makes me keep a bottle on the night stand and I am thinking about carrying some when I ride. It doesn't cost much and it could help you or someone else.