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.
Some of the complications of gastroparesis include: 1  Food that stays in the stomach too long can ferment, which can lead to the growth of bacteria.  Food in the stomach can harden into a solid collection, called a bezoar. Bezoars can cause obstructions in the stomach that keep food from passing into the small intestine.
1 The abnormal muscle contractions also cause pain.  Gastroparesis. This is what's called delayed gastric emptying â in other words, a stomach that's slow to empty itself. Your stomach muscles govern the movement of partly digested food through your stomach and into your small intestine.