Saccharomyces boulardii is given to infants in a mixture of warm water and food (milk or supplements). Saccharomyces boulardii is mainly used to treat diarrhea in children and adults as well as diarrhea symptoms caused by intestinal flora imbalance. In infants, this medicine may be taken by dissolving it completely in a small amount of warm water before taking it. For those who are not taking complementary foods, the medicine can also be mixed with milk and taken in a baby bottle. For those who have added complementary foods, it may be mixed with the complementary foods and then taken. Saccharomyces boulardii powder may cause side effects such as persistent constipation, dry mouth, hives, and allergic reactions. This drug contains lactose and fructose and is contraindicated in patients with congenital galactosemia, impaired glucose or galactose absorption syndrome, lactase deficiency and intolerance to fructose. It is also contraindicated in people who are allergic to the components of this drug or who have a centralized intravenous catheter infusion. Saccharomyces boulardii powder contains live cells and should not be administered to infants in hot or cold water above 50 ℃. The use of the drug should be strictly adhered to the doctor’s instructions.