Quinapril (marketed under the brand name Accupril by Pfizer) is an angiotensin-converting enzyme inhibitor (ACE inhibitor) used in the treatment of hypertension and congestive heart failure.

Pharmacology

Quinapril is a prodrug. It is converted to its active metabolite, quinaprilat, in the liver.

Mechanism of action

Quinapril inhibits angiotensin converting enzyme, an enzyme which catalyses the formation of angiotensin II from its precursor, angiotensin I. Angiotensin II is a powerful vasoconstrictor and increases blood pressure through a variety of mechanisms. Due to reduced angiotensin production, plasma concentrations of aldosterone are also reduced, resulting in increased excretion of sodium in the urine and increased concentrations of potassium in the blood.

Indications

Quinapril is indicated for the treatment of high blood pressure (hypertension) and as adjunctive therapy in the management of heart failure. It may be used for the treatment of hypertension by itself or in combination with thiazide diuretics, and with diuretics and digoxin for heart failure.

Contraindications

Pregnancy
Impaired renal and liver function
Patients with a history of angioedema related to previous treatment with an ACE inhibitor.
Hypersensitive to Quinapril

Side effects

Side effects of quinapril include dizziness, cough, vomiting, upset stomach and fatigue.

Quinapril drug information Cardiac glycoside Pharmacodynamics and clinical effects Thiazide side effects Phytosterols Mechanisms of hypokalemia Indications and usage Inhibitor effects Cardenolides Adverse effects Thiazide Digoxin Warnings Inhibitor adverse effects Clinical pharmacology Ace inhibitor Digoxin clinical use Quinapril faq Precautions Steroid