Which of the following agents is useful for the oral treatment ofboth pituitary as well as renal diabetes insipidus?: (A) Vasopressin, (B) Hydrochlohiazide, (C) Chlorpropamide, (D) Carbamazepine
Answer is B. (Ref: KDT 6/e p577, 578) Thiazides are useful in the treatment of central as well as nephrogenic DI. Vasopressin, chlorpropamide and carbamazepine are useful only in central DI.