No, you cannot swallow saliva during an endoscopy.
During an endoscopy, a tube is inserted into your throat, which makes swallowing difficult. According to information available, you will be unable to swallow the saliva that collects in your mouth during the procedure because the tube is in your throat. Instead, the saliva will be suctioned from your mouth periodically. A mouth guard will also be placed in your mouth for protection and to aid the procedure.
