A course of Bifidobacterium bifidum lasts from 3 to 14 days, depending on the patient’s specific condition, and taking Bifidobacterium bifidum needs to be directed by a doctor. The length of a course of Bifidobacterium bifidum varies from 3 to 14 days, depending on the patient’s physical condition. Bifidobacterium bifidum is mainly used to regulate intestinal flora imbalance, can relieve diarrhea, indigestion, bloating and other discomforts. At present, the adverse reactions and contraindications of Bifidobacterium bifidum are not clear, infants, children need to use Bifidobacterium bifidum under adult supervision, and consult the doctor for the specific dosage and course of treatment. Bifidobacterium bifidum should be used with caution for those who are allergic to Bifidobacterium bifidum and those with allergies. Bifidobacterium bifidum should be kept in the refrigerator to avoid inactivity of the bacteria. Bifidobacterium bifidum is not suitable for use in combination with antibacterial and antacid drugs. The medication needs to be used under the supervision of a doctor.