repeat endoscopy after 7 days of treatment with wax-matrix potassium chloride revealed that 10 of 15 ( 67 % ) of the subjects developed one or more gradable upper gastrointestinal lesions ( esophageal ulcer , gastric ulcer , eight cases of one or more mucosal erosions , and four cases of hyperemia or edema of the esophagus , stomach , or duodenum ) .
C3203348
upper gastrointestinal
C0038358
gastric ulcer