Polydipsia Overview Diabetes insipidus (die-uh-BEE-teze in-SIP-uh-dus) is an uncommon problem that causes the fluids in the body to become out of balance. That prompts the body to make large amounts of urine. It also causes a feeling of being very thirsty even after having something to drink. Diabetes insipidus also is called arginine vasopressin deficiency and arginine vasopressin resistance. While the terms "diabetes insipidus" and "diabetes mellitus" sound alike, the two conditions are not connected. Diabetes mellitus involves high blood sugar levels. It's a common condition, and it's often called simply diabetes. There's no cure for diabetes insipidus. But treatment is available that can ease its symptoms. That includes relieving thirst, lowering the amount of urine the body makes and preventing dehydration. Symptoms Symptoms of diabetes insipidus in adults include: Being very thirsty, often with a preference for cold water. Making large amounts of ...