“Ibuprofen works as a painkiller by affecting chemicals in the body called prostaglandins. Prostaglandins are substances released in response to illness or injury. They cause pain and inflammation (swelling). Prostaglandins that are released in your brain can cause a high temperature (fever or pyrexia).” (From http://www.nhs.uk/Conditions/Painkillers-ibuprofen/Pages/Introduction.aspx)
He knew he had been hit: instant darkness, the excruciating pain in his back. There was dust everywhere, he was half blinded, deaf, and he also knew that the warm liquid he felt all over him was his blood, and probably that of his comrades. Gradually he recovered some sight: a marine medic was close by, holding a metal bottle and trying to get him to swallow some brown pills, another guy was doing something with his left leg. He could now hear small arms fire, not far away. All around him he saw the bodies of his platoon. Suddenly he felt horribly hot.
“Welcome to Fallujah corporal” the medic said, as he swallowed another pill.