Eat the montelukast still diarrhea, may be because of infectious diarrhea or gastrointestinal dysfunction, so the simple use of montelukast, do not get better improvement, can be infectious diarrhea or gastrointestinal dysfunction of targeted medication. 1. Infectious diarrhea: If there is infectious diarrhea patients, in the use of antidiarrheal drugs before the need to correct diarrhea caused by water electrolyte disorders, but also combined with anti-infective drugs for treatment, such as levofloxacin, norfloxacin and other drugs. 2. Gastrointestinal dysfunction: you can use drugs to promote gastric power under the guidance of the doctor, such as domperidone, mosapride, itopride and other drugs, you can also use bifidobacteria to regulate gastrointestinal dysfunction. Eat montelukast still diarrhea, it is recommended to go to the hospital, under the guidance of the doctor to improve the examination, to clarify the cause of the disease, and to carry out targeted treatment, do not blindly use their own medicine.