Patients who meet the selection criteria will be observed for initial six hours, while their urine and stool specimen will be collected separately. Patient whose initial stool-output >4ml/kg/hour during this period and dark field examination of stool is positive will be enrolled in the study. Patients will be kept in study ward. After complete hydration, patients will be randomised in blocks of 6 to one of two groups A and B. Group A will receive syrup zinc and group B will receive placebo till cholera resolves. Both the groups will receive the identical bottles containing syrup with same flavor and only single unique serial number will be written on the bottles. The number will indicate an exact subject of study. Both the groups will receive Syrup/Tab Erythromycin. 1ml blood will be collected for serum zinc on admission after complete dehydration and this test will be repeated at the time of discharge. Stool culture and sensitivity (C/S) will be sent daily until the day of recovery or 5 days. Balance will be performed on all the patients till cholera resolves. If any complication develops after enrollment, study will be discontinued and patient will be treated accordingly.