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.
9 Potential Causes For Severe Stomach Pains. 2. Lactose Intolerance. Lactose intolerance causes, simply, a lack of the enzyme, lactase, which makes it impossible to digest lactose (or the sugars in dairy). Typically symptoms such as gas, abdominal pain, cramps, nausea, bloating, diarrhea, and even vomiting will occur within 30-minutes of consuming a dairy product.