There are many reasons for Nausea and Vomiting, some serious others functional, not so serious. Unless the causes are known it is not advisable to advise continued administration of any medicine howsoever safe it may appear. Your nausea if from serious causes like
liver involvement, metabolic reasons, other drug effects it must be pin pointed first. Other simple reasons like food irritation, anxiety, unpleasant odours etc are other causes which too need to be ascertained and then only should be ratified by a qualified physician.