baby diarrhea

After baby enter IFC for 2 days, baby develop diarrhea. Visited polyclinic and doctor issue electrolyte drink cause baby is only 2mo. Her feeding is ok - no reduced, very active, watery eyes, no sunken head, no fever or vomit. But already D4 but still diarrhea after every meal. Anybody know when the diarrhea will go away??