The correct way to take Lactulose is to swallow it directly without leaving it in the mouth, and the dose should be adjusted according to individual needs. 1. For constipation and clinical need to maintain soft stools, it is advisable to take one dose at breakfast, the starting dose for adults is 30ml and the maintenance dose is 10~25ml. 2. For children aged 7~14 years, the starting dose is 15ml and the maintenance dose is 10~15ml; for children aged 1~6 years, the starting dose is 5~10ml and the maintenance dose is 5~10ml; for infants, the starting dose is 5ml and the maintenance dose is 5ml. 3. In hepatic coma and pre-coma, the starting dose is 30~50ml three times a day; the maintenance dose should be adjusted to a maximum of 2~3 soft stools a day. Lactulose oral solution is suitable for chronic or habitual constipation regulation or hepatic encephalopathy, regulates the physiological rhythm of the colon, treats and prevents hepatic coma or pre-comatose state. The use of the drug can cause abdominal pain and bloating, it is contraindicated in patients with galactosemia, hypersensitivity to lactulose and its components, as well as in patients suffering from intestinal obstruction and acute abdominal pain. When using this drug, it should be noted that when used in patients with lactase deficiency, the amount of lactose in this product should be noted; this product is used in the treatment of hepatic coma or pre-coma in high doses, diabetic patients should be used with caution. If you need to use the drug patients, please under the guidance of the doctor and pharmacist strictly comply with medical advice to take medication, do not self-medication.