Newborns with diarrhea can take montelukast, but need to have relevant indications, and under the guidance of a doctor to take. Montelukast is mainly used for the treatment of acute and chronic diarrhea in adults or children, if the newborn diarrhea belongs to acute diarrhea or chronic diarrhea, you can use montelukast, but the use of drugs need to be adjusted to the dose of medication, so it is recommended to follow the doctor’s instructions to the newborn medication. The use of montelukast may have the adverse effect of mild constipation, if constipation occurs, the dose can be reduced to continue to take. In the treatment of acute diarrhea, care should be taken to correct dehydration. The drug is contraindicated in people who are allergic to montelukast. It is recommended that newborns with diarrhea go to the hospital for timely examination and treatment under the guidance of a doctor.