Thank you for your query.
Your daughter seems to be having a viral upper respiratory tract
infection and intestinal infection. Though the doctor has prescribed an antibiotic to be on the safer side the viral infection shall take its own time and should settle down in the next 24-48 hours. Even if it was a bacterial infection any antibiotic (Taxim-O) shall take 24-48 hours to have its effect.
Ensure that your daughter drinks enough fluids in the form of lemonade, coconut water, buttermilk so that she is not dehydrated.
I hope I have answered your query to your satisfaction.
Wishing your daughter an early recovery.