What's the "con" on taking 3-4 advils or ibuprofen during a marathon. I've been having to take a few when I get up past mile 15, to deal with various pains, on long runs, and I feel like a new man, if you can call someone who is a whiny, 9 year old petulant child--to pain, a man.

There has to be a negative side to popping advils. What is it though? I can't tell it affecting my hydration or glycogen levels.

It seems I'm not the only taking these. I was running with my training group and just about everybody had 2-3 advils in their fanny packs. In fact, I got pissed because some chick I was running with wouldn't give one of her pills to another guy who was running with us, who wanted one, so I had to give him one.