In the absence of drug contraindications, Bifidobacterium Bifidum Quadruple Bacteria Tablets and Lactobacillus can be used together, but it is usually not recommended to use Bifidobacterium Bifidum Quadruple Bacteria Tablets in combination with Lactobacillus. Bifidobacterium Bifidum Quadruple Activated Bacteria Tablets can be used for the treatment of diarrhea, functional dyspepsia, constipation and other symptoms caused by intestinal flora imbalance, but should not be used for the people who are allergic to Bifidobacterium Bifidum Quadruple Activated Bacteria Tablets; Lactobacillus can be used for the treatment of dyspepsia, pediatric diarrhea, intestinal fermentation abnormalities, but should not be used for the people who are allergic to lactacystin, lactose, galactose, and dairy products. Without the above contraindications then Bifidobacterium tetragonum tablets and lactobacilli can be used together. However, no matter Bifidobacterium quadruple live bacterial tablets or lactobacilli, both can play a role in inhibiting the growth of intestinal pathogenic bacteria and adjusting the balance of intestinal flora. Therefore, both of them have the same effect, and it is generally not recommended to use Bifidobacterium Bifidum Quadruple Bacteria Tablets and Lactobacillus in combination, and only one of the drugs can achieve the therapeutic effect. It should be noted that the adverse effects of Bifidobacterium Bifidum Quadruple Bacteria Tablets and Lactobacillus have not been clarified, and it is recommended to go to the hospital for medical consultation if you experience any discomfort after using the medication. Patients who need to use Bifidobacterium tetragonum tablets or Lactobacillus are recommended to use the medication under the guidance of a doctor.