Montelukast is an antidiarrheal medication that works relatively quickly, but there are individual variations. Montelukast can be used for acute and chronic diarrhea in adults as well as children. When the patient has diarrhea symptoms, in order to prevent dehydration, can follow the doctor’s instructions to choose the montelukast drug treatment, can achieve the purpose of stopping diarrhea, to prevent excessive loss of body fluids, caused by hydroelectrolyte disorders. Although montelukast can play a role in stopping diarrhea, but each person’s degree of sensitivity to the drug is different, the drug will play a slight difference in the time of action. Most patients can see the effect in a few hours after using montelukast, and there is no standard for the time. A small number of people taking Montelukast may produce mild constipation, it is forbidden for those who are allergic to this product, and allergic people should be cautious. If you are taking other medicines, drug interactions may occur, it is recommended that you consult your doctor for more information on the use of this drug.