Comparative Pharmacology
Head-to-head clinical analysis: AMILORIDE HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE versus CHLOROTHIAZIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AMILORIDE HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE versus CHLOROTHIAZIDE.
AMILORIDE HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE vs CHLOROTHIAZIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Amiloride is a potassium-sparing diuretic that blocks epithelial sodium channels (ENaC) in the distal convoluted tubule and collecting duct, inhibiting sodium reabsorption and reducing potassium excretion. Hydrochlorothiazide is a thiazide diuretic that inhibits the sodium-chloride cotransporter (NCC) in the distal convoluted tubule, increasing sodium, chloride, and water excretion.
Chlorothiazide inhibits the Na+-Cl- symporter in the distal convoluted tubule, reducing sodium and chloride reabsorption and promoting diuresis. It also causes vasodilation by reducing peripheral vascular resistance.
One tablet (amiloride 5 mg/hydrochlorothiazide 50 mg) orally once daily initially, increased if needed to twice daily. Maximum dose: amiloride 10 mg/hydrochlorothiazide 100 mg daily.
500 mg to 1000 mg orally or intravenously once or twice daily.
None Documented
None Documented
Clinical Note
moderateHydrochlorothiazide + Digoxin
"The risk or severity of adverse effects can be increased when Hydrochlorothiazide is combined with Digoxin."
Clinical Note
moderateChlorothiazide + Digoxin
"The risk or severity of adverse effects can be increased when Chlorothiazide is combined with Digoxin."
Clinical Note
moderateHydrochlorothiazide + Digitoxin
"The risk or severity of adverse effects can be increased when Hydrochlorothiazide is combined with Digitoxin."
Clinical Note
moderateAmiloride: 6-9 hours (prolonged in renal impairment); Hydrochlorothiazide: 6-15 hours (prolonged in renal impairment, heart failure).
Terminal half-life: 45–120 minutes (prolonged in renal impairment); clinical context: short duration requires frequent dosing
Amiloride: 50% unchanged in urine, 40% in feces (biliary); Hydrochlorothiazide: >95% unchanged in urine.
Renal: ~95% (tubular secretion); Fecal: <5%
Category A/B
Category C
Thiazide Diuretic
Thiazide Diuretic
Chlorothiazide + Digitoxin
"The risk or severity of adverse effects can be increased when Chlorothiazide is combined with Digitoxin."