Active Ingredient

Verapamil

Verapamil is a medication used to manage certain heart and blood vessel conditions. It belongs to a class of drugs called calcium channel blockers.

It helps in conditions where the heart needs to work less hard and blood pressure needs to be controlled.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Verapamil Brands

Isoptin

Strengths 40mg, 80 mg, 120mg, 240mg

Calan

Strengths 80mg, 120mg, 240mg

Verapamil Uses

Verapamil is commonly used to treat a variety of cardiovascular conditions.

High blood pressure (hypertension)
Angina (chest pain)
Certain types of arrhythmias (irregular heartbeats)
Prevention of migraines

How Verapamil Works

Verapamil works by relaxing the muscles of your heart and blood vessels. It does this by blocking calcium from entering the cells of the heart and arteries.

This action helps to lower blood pressure, reduce heart workload, and prevent angina attacks.

By reducing the force of contraction in the heart, it also helps in managing certain types of arrhythmias.

Common side effects of Verapamil

Not everyone experiences side effects with Verapamil, and many of them are mild and temporary.

Dizziness
Headache
Nausea
Constipation
Fatigue
Swelling in the ankles or feet

If you experience any serious or persistent symptoms, it is important to contact your doctor.

Monitor your blood pressure regularly while taking Verapamil.
Avoid consuming large amounts of alcohol as it can increase certain side effects.
Inform your doctor about all other medications you are taking to avoid potential interactions.
Do not stop taking Verapamil suddenly without consulting your doctor, as it may worsen your condition.
If you experience symptoms like severe dizziness or shortness of breath, seek medical attention promptly.

Always consult your doctor for personalized medical advice and before making any changes to your medication regimen.

Frequently Asked Questions

What does Verapamil do?

Verapamil helps to relax blood vessels and reduce the workload on the heart, which can lower blood pressure and manage heart-related conditions.

How long does it take for Verapamil to work?

The effects of Verapamil can be noticed within a few hours, but it may take a few weeks to achieve the full benefits for blood pressure control.

Is Verapamil safe for long-term use?

Verapamil is generally considered safe for long-term use under the guidance of a healthcare professional. Regular monitoring is recommended.

Can I take Verapamil with other medications?

Verapamil can interact with several other medications. It’s important to inform your doctor about all the medicines you are taking.

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

If you miss a dose, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose and continue with your regular schedule.