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Pharmacology · USMLE Step 1

USMLE Pharmacology: Renal and Diuretic Drugs

Loop, thiazide, potassium-sparing, and osmotic diuretics with mechanism of action and one signature side effect per card.

37 cards · basic cards · AI-written, checked twice. Edit anything.

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What is the mechanism of action of loop diuretics?
They inhibit the Na-K-2Cl cotransporter.
In which part of the nephron do loop diuretics act?
The thick ascending limb of the loop of Henle
What is the signature side effect of loop diuretics involving hearing?
Ototoxicity
Name three loop diuretic drugs.
Furosemide, bumetanide, and torsemide
Which loop diuretic lacks a sulfa moiety and can be used in patients with sulfa allergy?
Ethacrynic acid
How do loop diuretics affect urinary calcium excretion?
They increase calcium excretion, risking hypocalcemia
What potassium disturbance do loop diuretics cause?
Hypokalemia
Why can loop diuretics precipitate gout attacks?
They cause hyperuricemia by competing with uric acid for tubular secretion
What is a major clinical use of loop diuretics in acute heart failure?
Treating pulmonary edema
Loop diuretics are used to treat which acute electrolyte emergency of excess serum calcium?
Hypercalcemia
Furosemide
Loop diuretic
What is the mechanism of action of thiazide diuretics?
They inhibit the Na-Cl symporter
In which part of the nephron do thiazide diuretics act?
The distal convoluted tubule
How do thiazide diuretics affect urinary calcium excretion?
They decrease calcium excretion, causing hypercalcemia
What is the first-line diuretic class for treating essential hypertension in many patients?
Thiazide diuretics

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