i really do drink alot of water, and try to drink alot throughout the game, but almost always get a migraine after three hours of play, indoors or especially outdoors. all i can think of is dehydration as a trigger, but can't seem to cure it by drinking more. and this 'relpax' rx is so expensive to buy to treat the inevitable headache! yes, i have used the electrolyte powders before and after play, taken an aspirin before play, but have not yet found a way to NOT get that headache!! any one out there have success in preventing migraines?? please, summer in texas, and i only get 9 relpax a month!!