Patients who are allergic to any pharmaceutical ingredients should not take Montelukast. Montmorillonite powder is a relatively common medicine in life, the main ingredient is montmorillonite, excipients are glucose, vanillin, sodium saccharin, etc. It is a kind of white or off-white or yellowish fine powder, which is mainly used for the treatment of acute and chronic diarrhea of adults and children in clinic. Montelukast is a kind of mucosal protective agent, generally by adsorption of toxic substances, to relieve intestinal damage, to protect the intestinal mucosa, only a small number of people who take it may appear mild constipation adverse reaction. In addition, when taking Montelukast, it should be noted that patients who are allergic to any of the ingredients in the drug should not take Montelukast. If you need to take Montelukast to relieve diarrhea, you should choose the dosage under the guidance of a professional doctor and according to the specific situation, so as to avoid adverse consequences.