This study is a blinded clinical trial.This study will be conducted on 90 children with acute watery diarrhea, which in 1395 referred to gastrointestinal clinic Amirkola Children’s Hospital(Babol University of Medical Sciences). Children randomly (simple) are divided into two groups: The first group,45 patients receive syrup zinc sulfat(daily20mg) and lactose restricted diet (continued breastfeeding along with the elimination of lactose from the diet, especially the elimination of milk and the use of lactose-free supplement). The second group,45 patients received syrup zinc sulfat(daily20mg) and breast milk with normal diet. Inclusion criteria:children 6 months to 2 years with acute watery diarrhea(i.e.3 or more stools per day for less than 72 h).
Exclusion criteria:children under 6 months and more than two years, blood in the stool (dysentery infectious and non-infectious), more than 3 days have passed since the onset of diarrhea, recent use of antibiotics, organic diseases (heart, kidney, etc. .) is known, severe malnutrition (weight for
age <60% and/or weight for height <70%), Where diarrhea is causing complications such as seizures and ileus.All patients treated for 2 weeks and will be followed up and the number of defication, Presence or absence of Watery stools and Time to recover watery stools this information will be asked by phon from child mother and Will be recorded in a questionnaire.