When vomiting and diarrhea with fever occurs, it is not recommended to give drugs orally, and it is better to take intravenous infusion of drugs for treatment, commonly used drugs are levofloxacin injection or cephalosporin antibiotics. This is because when the patient has vomiting and diarrhea, oral administration of drugs will increase the burden on the gastrointestinal tract, leading to increased vomiting. When vomiting and diarrhea occur, the patient needs to abstain from food and water and hydrate the body. When accompanied by fever, it means that it is caused by dehydration, and also need to increase blood volume, so choose the most appropriate way of intravenous infusion, wait until the gastrointestinal function is gradually alleviated, and then orally administered, commonly used drugs are montelukast and gastroenterology Kang dispersible tablets or enteric inflammation Ning capsule. The patient’s diet should be based on easy-to-digest food, and it is best to take small and frequent meals, and return to normal diet after the disease is cured.