Thank you for your query.
Do not panic.This is drug induced diarrhoea
Add a probiotic
syrup till the antibiotic ends.She should get well.
If the diarrhoea continues then ask your doctor to change the antibiotic.
Meanwhile give your child lots of fluids and rehydrating solutions.
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Have a nice day.