Vasopressin has three main effects: 1  Increasing the water permeability of distal convoluted tubule and collecting duct cells in the kidney, thus allowing water reabsorption and excretion of more concentrated urine, i.e., antidiuresis.
It can be caused by damage to the vagus nerve, which regulates the digestive system. A damaged vagus nerve prevents the muscles in the stomach and intestine from functioning, preventing food from moving through the digestive system properly. Often, the cause of gastroparesis is unknown.
Gastroparesis is a long-term (chronic) condition where the stomach can't empty itself in the normal way. Food passes through the stomach more slowly than usual. It's thought to be the result of a problem with the nerves and muscles controlling the emptying of the stomach. If these nerves are damaged, the muscles of your stomach may not work properly and the movement of food can slow down. This page covers: Symptoms of gastroparesis.