Hello Welcome to Ask a Doctor service I have reviewed your query and here is my advice. Passing a stool three to four time in day is normal one and may not need any treatment, consistency and the color or stool is depends upon the diet taken, if the symptoms persists for days then try to change the diet first, diarrhea should never be checked with the medicine called Imodium because it may cause the paralytic ileus, on tentative basis or empirically Metronidazole can be tried twice in day for five days else the ideal way is to get done the stool examination for correct diagnosis Hope I have answered your query, let me know for further assistance.