<s>[INST] My 4 yr old boy (weight=16 kg)complains about stomach ache since yesterday morning.Also he had fever 100 degree yesterday night.He also vomited twice today early in the morning.I would like to know is it because of food poisoning or something else and also what the medicine i can give him????? [/INST] HiWelcome to the HCMIt seems that your child is suffering from gastroenteritis. It may be a self limiting viral infection or a food poisoning if he had taken anything contaminated orally in past 1-2 days. Don't worry as both these conditions require just symptomatic treatment and a good hydration. They usually improve within a few days. At present you may take the following measures to help him out:1. Give him an anti emetic such as Domperidone or Ondensetrone for relief of vomiting.2. Also give ranitidine or Lansoprazole for associated gastritis.3. Offer him good, healthy home made diet with plenty of oral rehydration fluids.4. Acetaminophen will help for fever spikes.Hopefully this will help. Take care </s>