Thanks for writing to health care magic.
If a child is vomiting
first antiemetics prescribed by your doctor should be given.
This will control the vomiting.
If the vomiting is not controlled by antiemetic then he should be given IV fluids (intravenous fluids)
A child with vomiting and loose motions should be monitored for dehydration
He can be given bland diet with out any spices at present.
Hope this helps.