Welcome to HealthcareMagic forum.
Your child is most probably suffering from gastroenteritis
The decision for hospital admission can only be taken by the treating doctor depending on the clinical findings of patient like moderate to severe dehydration
( decreased urine, dry mouth
), fever, persistent vomiting
, vital parameters like pulse Bp temperature etc.
So if the doctor has explained you the severity of the condition and need for intravenous medicines then it's best to follow his advice.
If patient is otherwise stable but vomiting due to medicines then injectibles or mouth dissolving antiemetic like ondansetron
can be given first followed by oral rehydration solution continuously as sips to prevent dehydration. Antibiotics and probiotics and zinc supplements should be given as per doctors prescription.
Hope this information is helpful to you .
Wishing your child a speedy recovery.