Active Ingredient

Captopril

Captopril is a medication that belongs to a class of drugs known as ACE inhibitors. It is commonly used to manage certain heart and blood pressure conditions.

This medication helps to relax blood vessels, making it easier for the heart to pump blood around the body.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Captopril Brands

Capoten

Strengths 25mg

Captopril Uses

Captopril is typically prescribed for managing various cardiovascular conditions.

High blood pressure (hypertension)
Heart failure
Left ventricular dysfunction after a heart attack
Diabetic kidney disease

How Captopril Works

Captopril works by blocking a specific enzyme in the body known as the angiotensin-converting enzyme (ACE). This enzyme is responsible for producing a substance that causes blood vessels to tighten.

By inhibiting this enzyme, Captopril helps to relax and widen blood vessels, which lowers blood pressure and improves blood flow.

This mechanism also reduces the workload on the heart, making it beneficial for heart failure patients.

Common side effects of Captopril

Not everyone experiences side effects with Captopril, and many side effects are mild and temporary.

Dizziness
Cough
Fatigue
Headache
Nausea
Rash
Altered taste sensation

If you experience any serious or persistent side effects, contact your healthcare provider.

Monitor your blood pressure regularly while taking Captopril.
Avoid consuming large amounts of alcohol as it can increase certain side effects.
Inform your doctor of any other medications you are taking to avoid potential interactions.
Do not use Captopril if you have a history of angioedema.
Contact your doctor if you experience swelling of the face, lips, or throat.

Always consult your doctor or healthcare provider for personalized medical advice.

Frequently Asked Questions

What is Captopril used for?

Captopril is used to treat high blood pressure, heart failure, and certain kidney problems in diabetic patients.

How does Captopril work?

Captopril works by relaxing blood vessels, which lowers blood pressure and reduces the heart’s workload.

Can I drink alcohol while taking Captopril?

It is advisable to limit alcohol consumption as it may enhance the blood pressure-lowering effects and increase side effects.

What should I do if I miss a dose of Captopril?

If you miss a dose, take it as soon as you remember unless it is almost time for your next dose. Do not double up on doses.

Are there any foods or drinks to avoid while taking Captopril?

You should avoid potassium-rich foods and salt substitutes, as they can increase potassium levels in the blood.