Taking Lactulose light gas and no bowel movement, if the initial treatment can be continued, if the drug does not relieve for 3 days should be discontinued and consult a doctor. Lactulose can regulate the physiological rhythm of the colon, prevent or treat hepatic coma. It is used clinically for chronic or habitual constipation and also for hepatic encephalopathy. Dosage should be based on age, bowel movements or general condition, under the supervision of a medical professional. 1. Continue the original regimen: the most common adverse reaction to lactulose is initial abdominal distension manifested by increased bowel movements; symptoms may disappear with continued treatment. 2. Increase the dosage: If you only have gas and no bowel movement after two days of use, you can consider increasing the dosage, but should be adjusted under the guidance of a medical professional to avoid overdose of drugs, abdominal pain, diarrhea and other adverse reactions. 2. Discontinuation: If the symptoms of gas and constipation do not improve after three days of use, the drug should be discontinued in time and consult a doctor to identify whether it is lactulose indications or organic intestinal obstruction, and do not blindly use the drug to prevent the condition from deteriorating.