Gastroscopy is not recommended for a short period of time after taking gastric mucosal protective drugs, but it is possible to perform gastroscopy by maintaining a sufficient fasting time after taking the drugs. If you take gastric mucosal protective agents, such as Rebapatide and Thioglycollate, etc. within a short period of time before gastroscopy, it may cover up pathological changes in the patient’s gastric mucosa, such as erosion, bleeding, etc., which will lead to the doctor not being able to find the lesions in time during the examination, so it is not recommended to do a gastroscopy within a short period of time after taking gastric mucosal protective agents. It is recommended to keep fasting for 6~8 hours after taking the medicine, and gastroscopy can be done in such cases, which will not adversely affect the examination results. If you are not sure whether the medication will affect the gastroscopy, you can go to the hospital and consult a professional doctor.