Hyperosmotic diuretics are contraindicated in which patients?

Hyperosmotic diuretics are contraindicated in which patients?

• A. Renal or heart disease
• B. Hypertension
• C. Age over 65
• D. Diabetes control

Answer: (A)

Hyperosmotic diuretics raise plasma osmolality to pull water out of tissues and into the bloodstream, then promote diuresis. This mechanism depends on the kidney’s ability to excrete the solute and handle the increased fluid load. In patients with renal disease, the kidneys can’t effectively clear the osmotic agent, leading to accumulation, fluid overload, and electrolyte imbalances. In heart disease, the initial rise in intravascular volume and preload can worsen congestion and precipitate or worsen pulmonary edema or heart failure symptoms. Because of these risks, hyperosmotic diuretics are avoided in people with renal impairment or significant heart disease. They may be used cautiously in specific situations with close monitoring, but the general contraindication lies with renal or heart dysfunction.

Hyperosmotic diuretics raise plasma osmolality to pull water out of tissues and into the bloodstream, then promote diuresis. This mechanism depends on the kidney’s ability to excrete the solute and handle the increased fluid load.

In patients with renal disease, the kidneys can’t effectively clear the osmotic agent, leading to accumulation, fluid overload, and electrolyte imbalances. In heart disease, the initial rise in intravascular volume and preload can worsen congestion and precipitate or worsen pulmonary edema or heart failure symptoms.

Because of these risks, hyperosmotic diuretics are avoided in people with renal impairment or significant heart disease. They may be used cautiously in specific situations with close monitoring, but the general contraindication lies with renal or heart dysfunction.