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.
Gastroparesis occurs when the stomachâs normal electrical activity stops functioning correctly or when muscles don't respond to these electrical signals. This results in slowness in emptying the food into the small intestine with resultant symptoms. The most common causes for gastroparesis are: 1  Diabetes. 2  Thyroid disease. 3  Medications. Stomach surgery.  Neurologic and neuromuscular diseases such as Parkinsonâs Disease and Multiple 1  Sclerosis. Autoimmune diseases like lupus.  Diseases that may infiltrate the stomach like amyloidosis and 1  scleroderma. Viral infections.