Loop Diuretics · Pharmacology

Why are loop diuretics preferred over thiazide diuretics in patients with a Glomerular Filtration Rate (GFR) below 30 mL/min?

  1. Loop diuretics are less toxic to the liver
  2. Loop diuretics retain efficacy at low GFR
  3. Loop diuretics increase potassium levels
  4. Thiazides cause more severe dehydration
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Correct answer: Loop diuretics retain efficacy at low GFR

Unlike thiazide diuretics, which lose their effectiveness as renal function declines, loop diuretics remain effective in patients with advanced renal insufficiency. They are often necessary to manage fluid overload in chronic kidney disease.

Difficulty: Medium Question 7 of 20

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