In general, Bacillus licheniformis and Montelukast can be taken at the same time. Bacillus licheniformis belongs to intestinal probiotics, which can play a role in changing the environment of intestinal flora, regulate gastrointestinal function, and have a good effect on improving symptoms of acute and chronic enteritis and diarrhea caused by bacteria or fungi. Bacillus licheniformis can inhibit the survival of harmful bacteria and promote the growth of bifidobacteria, lactobacillus and other beneficial bacteria, thus promoting gastrointestinal digestion and absorption. Montelukast is a kind of antidiarrheal drug, with pathogen adsorption and intestinal mucosa protection, generally used to assist in the treatment of acute and chronic diarrhea in adults and children, but also used to alleviate the pain and other symptoms caused by esophageal, gastric and duodenal diseases. Montelukast can adsorb pathogens and toxins, so that both lose pathogenic effect, can be used to regulate intestinal flora. Both Montelukast and Bacillus licheniformis have the effect of regulating intestinal flora, so they can be taken at the same time. It should be noted that all of the above drugs should be taken under the guidance of a doctor and should not be used without authorization.