enalapril
Enalapril is an ACE inhibitor, a prodrug converted to enalaprilat, that relaxes blood vessels by blocking angiotensin II formation. It lowers blood pressure and lightens the heart's workload, and is used in hypertension and heart failure.
This page is based on the EMA medicine record for enalapril, cross-checked with MedlinePlus and the National Cancer Institute dictionary; the mechanism is explained in plain language, and analogies are used only where they stay accurate.
How it works
Explains what the medicine does in the body, not dosing, side effects, or safety.
An analogy
Angiotensin II is a signal that squeezes the body's pipes tighter, forcing the heart pump to strain. ACE is the machine that prints that signal. Enalapril unplugs the printer: fewer squeeze signals are made, the pipes relax, pressure falls, and the pump works against an easier load.
In simple terms
The body makes a hormone called angiotensin II that narrows blood vessels and raises blood pressure. An enzyme, ACE, produces it. Enalapril is a prodrug that the liver converts into enalaprilat, which blocks ACE. With less angiotensin II, blood vessels relax and widen, blood pressure drops, and the heart does not have to push as hard - helpful in both hypertension and heart failure.
In depth
Enalapril maleate is hydrolysed in the liver to enalaprilat, a competitive inhibitor of angiotensin-converting enzyme. Reduced conversion of angiotensin I to angiotensin II lowers systemic vascular resistance, arterial pressure and aldosterone secretion, while bradykinin accumulation contributes to vasodilation. In heart failure the combination of reduced preload and afterload improves cardiac output and symptoms.
See it in motion
A schematic animation of the mechanism — simplified for clarity, not drawn to scale.
Enalapril unplugs the printer: fewer squeeze signals are made, the pipes relax, pressure falls, and the pump works against an easier load.
- The body makes a hormone called angiotensin II that narrows blood vessels and raises blood pressure.
- ACE is the machine that prints that signal.
- Enalapril is a prodrug that the liver converts into enalaprilat, which blocks ACE.
- With less angiotensin II, blood vessels relax and widen, blood pressure drops, and the heart does not have to push as hard - helpful in both hypertension and heart failure.
Target: Angiotensin-converting enzyme (ACE)
The enzyme that produces angiotensin II, a hormone that tightens blood vessels and raises blood pressure; blocking it relaxes vessels and reduces the heart's pumping load.
Approved uses
Approved uses differ by country and change over time. Always follow your local prescribing information.
Approved uses in European Union
EMA- Treatment of heart failure
Official sources
The statements on this page trace back to these records.
- Aqumeldi (enalapril) — Summary of product characteristics and package leaflet, English version
European Medicines Agency
- MedlinePlus: enalapril
MedlinePlus, U.S. National Library of Medicine
- National Cancer Institute: enalapril maleate
National Cancer Institute
This page explains how the medicine works — it isn’t the patient leaflet. For anything that applies to you, read the leaflet that came with your medicine or ask your pharmacist.
MedUnfold provides educational content and is not medical advice. Always follow your local prescribing information and healthcare professional.