question: My sister (63 yrs old) has had flu synptoms for about 10 days.  She did go to the clinic after experiencing a fever of 104 and bouts of coughing.  She was diagnosed as having chest infection and sinus infection.  She seemed to get better after having antibiotics but she has gotten worse after finishing her script. She started with diareah which has now stopped but was also vomiting whch is now become just a nausea but she has alot of abdominal pain.  She is taking immodeum and gingerale but not able to eat.  She is extremely tired but not lethargic.