Thanks for your query.
Your child has fever
which could be due to viral infection(more likely) or even bacterial infection.
I would suggest you to use antibiotic Taxim-O for another day and if the fever does not subside then you may consult your Paediatrician and he will prescribe another antibiotic.
An antibiotic has to be used for at least 3 days and then you may get it changed if it is ineffective as random change of antibiotics can cause resistance.
Hope this answer is helpful to you.