Comparative Pharmacology
Head-to-head clinical analysis: AMLODIPINE BESYLATE BENAZEPRIL HYDROCHLORIDE versus PRINIVIL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AMLODIPINE BESYLATE BENAZEPRIL HYDROCHLORIDE versus PRINIVIL.
AMLODIPINE BESYLATE; BENAZEPRIL HYDROCHLORIDE vs PRINIVIL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Amlodipine is a dihydropyridine calcium channel blocker that inhibits the influx of calcium ions into vascular smooth muscle and cardiac muscle, leading to vasodilation and reduced peripheral vascular resistance. Benazepril is an angiotensin-converting enzyme (ACE) inhibitor that prevents the conversion of angiotensin I to angiotensin II, resulting in vasodilation, decreased aldosterone secretion, and reduced blood pressure.
Lisinopril is an angiotensin-converting enzyme inhibitor that decreases angiotensin II production, reducing vasoconstriction and aldosterone secretion, leading to decreased blood pressure.
Oral, 1 capsule (amlodipine 2.5-10 mg / benazepril 10-40 mg) once daily. Start with amlodipine 2.5 mg / benazepril 10 mg, titrate based on response.
Initial dose 10 mg orally once daily; titrate to target dose of 20-40 mg daily based on blood pressure response.
None Documented
None Documented
Amlodipine: terminal elimination half-life 30-50 hours (mean ~35 h), allowing once-daily dosing. Benazeprilat: effective half-life 10-11 hours; terminal half-life ~22 hours, with prolonged effects in renal impairment.
Terminal elimination half-life is approximately 12 hours, with accumulation noted in renal impairment; effective half-life at steady state extends to 30-50 hours in patients with creatinine clearance <30 mL/min.
Amlodipine: ~90% metabolized to inactive metabolites, ~10% excreted unchanged in urine; metabolites excreted renally (~60%) and fecally (~20-25%). Benazepril: hydrolyzed to benazeprilat, which undergoes renal excretion (~33% as unchanged drug and metabolites) and biliary/fecal excretion (~33%), with the remainder via other routes.
Renal excretion accounts for approximately 60% of total clearance, primarily as unchanged lisinopril; fecal excretion accounts for negligible amounts.
Category D/X
Category C
ACE Inhibitor
ACE Inhibitor