My son is 19 and was recently diagnosed with the influenza b. He is a college freshman and was prescribed Tamiflu by the clinic there. He took the meds for 2 days and then he felt better so he decided he was fine. UGH!!!! He was diagnosed almost two weeks ago, although I realize that stopping the medication was not the smartest and best thing to do, he is still sufferring from a headache. He says he feels better if he takes two advil each day, but he doesn't want to continue doing that much longer. He still has a cough in the morning and at night, but that appears to be much better. Is it normal for him to still have a headache? Should he return to the clinc?