Diabetes Insipidus: A Challenging Diagnosis with New Drug Therapies

Table 3

	Water restriction test; Urine osmolality	Desmopressin test; Urine osmolality	Desmopressin test; Plasma osmolality	Desmopressin test; Urine volume
Primary polydipsia		No response	No response	No response
Central diabetes insipidus
Partial central diabetes insipidus
Nephrogenic diabetes insipidus