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 disorder that slows or stops the movement of food from the stomach to the small intestine. It occurs when the vagus nerve (which controls the stomach muscles) is damaged by illness or injury so the stomach muscles can no longer function properly and digest food. The most common symptoms of gastroparesis are nausea, a feeling of fullness after only eating a small amount of food and vomiting undigested food. It can also cause issues with reflux, bloating, stomach pain and lack of appetite.