Hi welcome to the health care magic You are having food toxin induce gastroenteritis as per history Initially if Symptomatic management help than no need for antibiotic usage If condition not improve than stool examination done and if it seems bacterial than only suitable broad spectrum antibiotic given like ofloxacin and ornidazole combination drug Meanwhile drink more water to maintain hydration Avoid heavy fatty meal and excess spicy foods.. For vomiting domperidone tablet can be prescribed Probiotic tablet to replenish lost bacterial flora can be prescribed Take care Consult physician for examination Hope your concern solved