The main component of lactobacillin granules is lactobacillin, which can form a protective layer in the intestinal tract to prevent pathogenic bacteria and viruses from attacking, and also stimulate the intestinal tract to secrete antibodies and improve the immunity of the intestinal tract. It can selectively kill pathogenic bacteria in the intestine, protect the growth of beneficial bacteria, and play a role in regulating the intestinal mucosa. It can also maintain water balance, promote gastric acid secretion and enhance digestive function. Based on the above pharmacological effects, this drug is mainly used for indigestion, as well as enteritis and pediatric diarrhea. Its adverse reactions are relatively mild, and there is basically no adverse reaction under normal use. When using it, attention should be paid to the possible interaction with other drugs, mainly bismuth preparations, tannic acid, medicinal charcoal and hydrocarbon agents, which can adsorb lactobacillus granules, so it should not be used in combination with lactobacillus tablets.