How does verapamil work?
Verapamil blocks calcium from entering muscle cells in the heart and blood vessels, causing them to relax. This lowers blood pressure, improves blood flow, and reduces heart strain.
What is verapamil used to treat?
Verapamil is commonly prescribed for:
- High blood pressure (hypertension)
- Angina (chest pain caused by reduced blood flow to the heart)
- Arrhythmias (irregular heartbeats, such as atrial fibrillation and supraventricular tachycardia)
- Migraine prevention (in some cases)
Who can take verapamil?
Verapamil is suitable for most adults, as prescribed by a doctor.
Who might not be able to take verapamil?
Verapamil may not be suitable if you:
- Have severe heart failure or a slow heart rate
- Have low blood pressure (hypotension)
- Have liver disease
- Are taking medications that interact with calcium channel blockers
Can I take verapamil if I’m pregnant or breastfeeding?
Verapamil isn’t usually recommended during pregnancy or breastfeeding, but your doctor will assess the risks and benefits before prescribing it.
What if I miss a dose?
If you forget a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed one—do not take two doses at once.
How effective is verapamil?
Verapamil is highly effective at lowering blood pressure, managing angina, and controlling heart rhythm disorders when taken consistently.
What should I do if I take too much?
Taking too much verapamil can cause dangerously low blood pressure, slow heart rate, or fainting. If you think you’ve taken too much, seek emergency medical help immediately.
What dose of verapamil is usually taken?
- For high blood pressure: 120mg to 240mg once or twice daily
- For angina: 80mg to 120mg three times daily
- For arrhythmias: 120mg to 480mg daily, depending on the condition
Your doctor will determine the correct dose based on your condition.
Powered by pharmacies
With over 1,700 pharmacy partners across the UK, you can get the help you need, wherever you are based.
Our website and mobile app make it easy and convenient to manage your health needs and book services at a pharmacy nearby.
What are the side effects of verapamil?
Common side effects include:
- Dizziness or lightheadedness
- Fatigue
- Swelling in the ankles or feet
- Constipation
- Flushing or warmth in the face
Serious side effects, such as severe dizziness, chest pain, or difficulty breathing, require urgent medical attention.
How should I take verapamil?
Verapamil is taken as tablets, capsules, or liquid, usually once or twice daily.
When should verapamil be taken?
Verapamil should be taken at the same time each day, with or after food to reduce stomach upset.
What are the brand names for verapamil?
Verapamil is available as a generic medicine, but some branded versions include:
- Isoptin
- Verelan
- Calan
Final thoughts
Verapamil is an effective medication for high blood pressure, angina, and heart rhythm disorders, but it should be taken exactly as prescribed. If side effects occur, speak to your doctor or pharmacist.
