Common electrolyte imbalance found in patient with syndrome of inappropriate antidiuretic hormone is _________.

Common electrolyte imbalance found in patient with syndrome of inappropriate antidiuretic hormone is _________.

• A. hypochloremia
• B. hyponatremia
• C. hyperglycemia
• D. hyperkalemia

Answer: (B)

Excess ADH causes the kidneys to retain water, diluting the blood sodium. This leads to dilutional hyponatremia, a common finding in SIADH, where serum sodium falls while the body appears euvolemic and urine remains relatively concentrated with higher sodium content. The hallmark is low serum sodium due to water retention, not a primary change in potassium or glucose. Hyperkalemia and hyperglycemia are not typical features of SIADH, and hypochloremia is not the defining electrolyte abnormality here.

Excess ADH causes the kidneys to retain water, diluting the blood sodium. This leads to dilutional hyponatremia, a common finding in SIADH, where serum sodium falls while the body appears euvolemic and urine remains relatively concentrated with higher sodium content. The hallmark is low serum sodium due to water retention, not a primary change in potassium or glucose. Hyperkalemia and hyperglycemia are not typical features of SIADH, and hypochloremia is not the defining electrolyte abnormality here.