Be careful about using non-steroidal anti-inflammatories (NSAIDs) such as Ibuprofen, Dicloflex, Diclofenac, Voltaren (/ol). They can cause acute renal failure in some people particularly in combination with dehydration. They can also cause epigastric/pancreatic pain. There have been deaths attributed to ibuprofen used by dehydrated runners in the Marathon des Sables and other ultras. One of my daughters ended up in hospital on a drip in February after such a reaction and it's not as rare a side effect as you might think.
I use a little Ibu gel after a long run sometimes to stop me cramping up when driving home, but I drink plenty with it and use it very cautiously now.