post-vagotomy diarrhea post-vagotomy diarrhea post-vagotomy diarrhea is a form of diarrhea which occurs in 10% of people after a truncal vagotomy, which can range from severe to debilitating in approximately 2% to 4% of patients. however, the occurrence of post-vagotomy diarrhea is significantly reduced after proximal selective vagotomy, specifically when celiac and hepatic branches of the vagus are retained. post-vagotomy diarrheacourse of vagus nervespecialtygastroenterology treatment surgical treatment for refractory post-vagotomy diarrhea is rarely needed and at least one year from the occurrence of symptoms should be allotted to ensure all non-surgical treatments have been appropriately explored. under severe cases, where surgical intervention does become necessary, a 10 cm reverse jejunal interposition is usually the procedure of choice.