Hello and welcome to health care magic. Thanks for your query.
As per your description it seems like your daughter must have
developed drug induced gastritis
Antibiotics are known to cause gastric mucosal erosion and discomfort
in the stomach.
I would suggest you to give antacids like mucaine
gelor syrup thrice a
day after food.
For head ache she can take mild pain killers like plain Paracetamol
tablet instead of ibrofen.
Wish you all the best
DR SHEEBA STEPHEN
( Emergency consultant)