Carvedilol — NZ Medication Guide
📋 Reviewed by a Registered Pharmacist NZ — This information is for general educational purposes only and does not replace professional medical advice. Always consult your doctor or pharmacist before starting, stopping, or changing any medication.
What is Carvedilol?
Carvedilol is a non-selective beta-blocker with additional alpha-1 adrenergic blocking activity, used in heart failure and hypertension. This medication is commonly prescribed in New Zealand and is funded by Pharmac for heart failure.
What is Carvedilol Used For?
Carvedilol is used for the treatment of chronic heart failure (stable, mild-to-severe), left ventricular dysfunction following myocardial infarction, and hypertension. It reduces mortality in patients with heart failure with reduced ejection fraction.
How Does Carvedilol Work?
Carvedilol blocks both beta-1 and beta-2 adrenergic receptors as well as alpha-1 receptors, resulting in vasodilation (via alpha-1 blockade) and reduced heart rate and contractility. This combination reduces cardiac workload and improves symptoms and survival in heart failure.
How to Take Carvedilol
Taken twice daily with food to reduce the risk of orthostatic hypotension. Heart failure dosing begins at 3.125 mg twice daily and is titrated upward over weeks to a target dose of 25–50 mg twice daily. Do not stop suddenly.
Common Side Effects of Carvedilol
- Dizziness or light-headedness (especially on standing)
- Fatigue
- Slow heart rate (bradycardia)
- Weight gain and fluid retention
- Blurred vision
- Nausea or diarrhoea
Serious Side Effects — Seek Medical Attention
Contact your doctor or call 111 immediately if you experience any of the following:
- Severe hypotension (very low blood pressure)
- Worsening heart failure or breathlessness
- Liver problems (rare — yellowing of skin or eyes)
- Severe bradycardia or heart block
- Severe allergic reaction
Drug Interactions
Carvedilol may interact with other medicines. Always inform your doctor and pharmacist of all medications, supplements, and herbal products you are taking. Key interactions include:
- Digoxin (increased risk of bradycardia)
- Verapamil and diltiazem (severe bradycardia risk)
- Clonidine
- Rifampicin (reduces carvedilol levels)
- Ciclosporin (increased cyclosporine levels)
- Insulin and antidiabetics
New Zealand Prescribing Information
Carvedilol is funded by Pharmac for heart failure and is available as 3.125 mg, 6.25 mg, 12.5 mg, and 25 mg tablets. It is typically initiated by a cardiologist or specialist and managed in primary care once stable.
Frequently Asked Questions
Why do I need to take carvedilol with food?
Taking carvedilol with food slows its absorption and reduces the risk of a sudden drop in blood pressure (orthostatic hypotension), which can cause dizziness or fainting — particularly when you stand up.
How is carvedilol different from bisoprolol?
Both are beta-blockers used for heart failure, but carvedilol also blocks alpha-1 receptors, providing additional vasodilation. The choice between them depends on individual patient factors and is made by your cardiologist or doctor.
⚠️ Disclaimer: This page is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your doctor or a qualified health provider with any questions you may have regarding a medical condition or medication. In New Zealand, medication availability and funding may vary — check with Pharmac or your pharmacist for the most current information.
Reviewed by a Registered Pharmacist NZ
References & Further Information
The following New Zealand and international resources were used to inform this page: