The symptoms of fever, nausea and vomiting are caused by a number of factors and require different treatments according to the cause in order to achieve a cure. 1. If the symptoms are caused by acute gastroenteritis, you can take anti-inflammatory drugs such as norfloxacin capsules or oxytetracycline, as well as drugs that promote gastrointestinal motility such as cisapride, to relieve the symptoms of nausea and vomiting. 3.