Medicine General c9abe007 All are true regarding SIADH except: A Increased level of ADH B Urine hypoosmolar C Hyponatremia D Adequate hydration status High-Yield Explanation Answer is B (Hyposmolar urine): SIADH is characterized by an inappropriately increased urine osmolality (Hyperosmolar urine) in the presence of decreased plasma osmolality.