Hi welcome to the health care magic According to history provided she is having acute gastroenteritis by outside food bacterial toxin... She can be prescribed following medication... Tablet rabeprazole plus domperidone combination drug (for ex. RABEZ DSR) taken two times a day.. If diarrhea present than better to give broad spectrum antibiotic like ofloxacin plus ornidazole combination drug Drink warm water for drinking Maintain hydration Avoid excess spicy foods and fatty meals Take small meals with frequent interval Cooked oatmeal help in soothing stomach Avoid outside foods for atleast week Consul physician for examination with keeping all this in mind Hope I have solved your query