Suggest Treatment For Flu Symptoms Like Fever,cough And Body Pain

A family member of mine has the flu for a few days now. He has a severe headache with a on and off fever ranging from 100 to 102 degrees. He has a cough and chest congestion. He also is having body pains. He has been taking tylenol for the fever and pain and is taking robitussin for the cough. He still doesnt feel to well ...pls advise!