My son is 29 and he has been running a fever and feeling tired, achy, and a little cough since December 5th, he has been to a doctor and has had chest xray, blood work, a flu test, and test that has been done on his liver and kidneys, everything came back okay. His white cells are normal, they gave him antibiotics for 10 days and if he does not feel any better in 10 days to come back, he has been taking the pills for 2 days, I just talk with him tonight and he said his fever is 100.8. It has got up to 103.8, he takes fever medicine and it brings it down until the medicine goes out of his system and then his fever raises again.