Diarrhea after breakfast may be caused by a variety of factors such as abdominal cold, gastrointestinal dysfunction, etc. Relief medications include montelukast, lactobacillus tablets and so on. Patients in the use of drugs, need to be under the guidance of the doctor to avoid overdose to the body to bring adverse effects. 1. Montelukast: Montelukast is a kind of antidiarrheal drug, the main ingredient of which is montelukast, which can assist in the recovery of the intestinal mucosa, and can play a role in relieving the patient’s diarrhea. Generally speaking, the side effects of montelukast are relatively small, but people who are allergic to montelukast need to take it with caution. 2. Lactobacillus tablets: its main ingredient is lactobacillus, which is a kind of intestinal need of beneficial bacteria, after taking will help the patient to hinder the intestinal harmful bacteria, weakening the harmful bacteria for intestinal stimulation, has to help intestinal digestion and absorption of the role of diarrhea can be relieved. But lactobacillus tablets can not be taken together with astringent drugs, the two are prone to react, thus stimulating the intestinal tract is prone to produce adverse effects. It is recommended that patients go to the hospital in time to identify the cause of the disease and timely treatment, to avoid intestinal health is affected.