Thanks for writing your query.
After reading your post, it seems that your daughter is having upper respiraory tract infection.
Cefexime is an antibiotic and will help in treating the infection, where the cause is bacterial.
You should also give her paracetamol
after discussing with her Paeditrician.
Also give her probiotic
preparation along with the antibiotic.
Antihistaminic can be given for cough
You should give her any medicine after discussing with her Paeditrician.
Also give her fresh fruits and vegetables to increase her immunity.
Encourage her to wash her hands before eating as this will prevent entry of germs in body.
I hope this is helpful to you.