Advil. You can take 800 mg (4 caplets) every 6-8 hours. I don't usually take quite that many. I'll take 2-3 a few hours before the race.

Then I carry some with me in case I need them mid-race (as long as it's 6 hours since I took the first dose).

After the marathon, stretch and ice if you can. And take Advil for the next day. It will help.

Hopefully his tummy can tolerate it though... some people have a tougher time when taking large amounts of Advil.

she could never take that much Advil. Sounds like a lot.