Why are thiazide diuretics considered less effective in patients with a Glomerular Filtration Rate (GFR) below 30 mL/min?
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Correct answer: They fail to reach their site of action in the tubular lumen
Thiazides must be secreted into the tubular lumen to work. In severe renal impairment, the delivery of the drug to the distal tubule is insufficient to produce a meaningful diuretic effect, necessitating the use of loop diuretics.
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More Thiazide Diuretics questions
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