Whether Lactulose can be used for vaccination depends mainly on one’s health condition. If one is using Lactulose only for constipation and has no other discomforts, he/she can be vaccinated normally; however, if one is using Lactulose for hepatic encephalopathy, etc., and is in the acute exacerbation stage, he/she cannot be vaccinated with the New Crown Vaccine. Lactulose is a medicine that can be used to treat chronic constipation and hepatic encephalopathy. Neocoronavirus vaccine is a biological agent used to prevent neocoronavirus pneumonia. Whether or not you can receive the New Crown Vaccine vaccine after using lactulose on your own depends largely on what you are using lactulose for. If you are taking lactulose because of chronic constipation, you can usually get vaccinated with the New Crown vaccine. If Lactulose is used because of hepatic encephalopathy, it is contraindicated for the New Crown Vaccine in unstable conditions and should not be vaccinated until the condition is stabilized. The use of lactulose may cause abdominal distension and other adverse reactions, and long-term high-dose use of the drug may lead to electrolyte disorders due to diarrhea. In addition, intestinal obstruction, acute abdominal pain, allergy to the drug should be prohibited, and prohibited and other laxatives at the same time. If the symptoms do not improve after 2-3 days of treatment for constipation, consult a physician. If serious discomfort occurs after vaccination, consult a doctor promptly to avoid adverse consequences. Tips] In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.