Montelukast is used for acute and chronic diarrhea in adults and children and is usually taken with warm water. Montelukast is the name of a western medicine, belongs to the antidiarrheal medicine, mainly used to treat acute and chronic diarrhea in adults and children. Montelukast is taken orally, when taking the drug can be poured into half a cup of warm water and mixed to take. It should be noted that some patients taking Montelukast may produce mild constipation, if constipation occurs, you can reduce the dose and continue to take. The drug contraindications have not been clearly defined, allergic to the product is prohibited, such as overdose or serious adverse reactions, the drug should be immediately discontinued to seek medical attention. When treating acute diarrhea, attention needs to be paid to correcting dehydration. If you need to take montelukast, it is recommended to take under the guidance of a doctor. Observe your own situation during the use of the drug, and if there is obvious discomfort, it should be dealt with in a timely manner.