Lactulose is a cathartic drug that will promote intestinal peristalsis and stimulate the discharge of stool, so if you drink lactulose under such circumstances, you may experience significant intestinal flatulence due to stimulation of intestinal peristalsis. The presence of intestinal flatulence may stimulate intestinal peristalsis spasms and cause gas to be expelled from the anus, which is why there is a lot of exhaustion, which is a normal state, not to worry. If there is a lot of gas and accompanied by serious diarrhea, it is recommended to stop using it in a timely manner, and it is best to give antidiarrheal drugs, such as enteritis or flavopiridol drugs. In addition, in the diet should pay attention to a light diet, avoid eating too much gas-producing food, such as radish, sweet potatoes, etc..