Bisoprolol — 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 Bisoprolol?
Bisoprolol is a selective beta-1 adrenergic receptor blocker (beta-blocker) used primarily for the management of heart failure, hypertension, and certain arrhythmias. This medication is commonly prescribed in New Zealand and is funded on the Pharmac schedule for heart failure and hypertension.
What is Bisoprolol Used For?
Bisoprolol is prescribed for chronic heart failure (reduced ejection fraction), hypertension (high blood pressure), angina pectoris, and rate control in atrial fibrillation. It is a cornerstone medicine in heart failure management per New Zealand and international guidelines.
How Does Bisoprolol Work?
Bisoprolol selectively blocks beta-1 adrenergic receptors in the heart, reducing heart rate, myocardial contractility, and cardiac output. This decreases the workload on the heart, lowers blood pressure, and improves cardiac remodelling in heart failure over time.
How to Take Bisoprolol
Usually taken once daily in the morning, with or without food. For heart failure, treatment is started at a low dose (1.25 mg daily) and gradually uptitrated every 2 weeks to the target dose (usually 10 mg daily) as tolerated. Do not stop bisoprolol suddenly without medical advice — withdrawal can trigger rebound hypertension or angina.
Common Side Effects of Bisoprolol
- Fatigue and tiredness (especially in the first few weeks)
- Cold hands and feet (peripheral vasoconstriction)
- Dizziness or light-headedness
- Bradycardia (slow heart rate)
- Sleep disturbances or vivid dreams
- Nausea
Serious Side Effects — Seek Medical Attention
Contact your doctor or call 111 immediately if you experience any of the following:
- Heart rate below 50 beats per minute
- Severe breathlessness or worsening heart failure
- Signs of hypoglycaemia if diabetic (bisoprolol can mask symptoms)
- Severe allergic reaction (rash, swelling, difficulty breathing)
Drug Interactions
Bisoprolol may interact with other medicines. Always inform your doctor and pharmacist of all medications, supplements, and herbal products you are taking. Key interactions include:
- Verapamil and diltiazem (calcium channel blockers — risk of severe bradycardia)
- Amiodarone and digoxin (increased risk of bradycardia and heart block)
- Other antihypertensives (additive blood pressure lowering)
- Clonidine (abrupt withdrawal can cause rebound hypertension)
- Insulin and oral hypoglycaemics (can mask hypoglycaemia symptoms)
New Zealand Prescribing Information
Bisoprolol is fully funded by Pharmac in New Zealand for heart failure and hypertension. It is available as 1.25 mg, 2.5 mg, 5 mg, and 10 mg tablets. Common NZ brands include Bicor® and generic bisoprolol. Dose uptitration for heart failure should follow the NZ Heart Failure Guideline recommendations.
Frequently Asked Questions
Can I stop taking bisoprolol suddenly?
No — bisoprolol should never be stopped abruptly. Sudden withdrawal can cause a dangerous rebound increase in heart rate and blood pressure, and may trigger angina or a heart attack. Always speak to your doctor before stopping or reducing your dose.
Can I drink alcohol while taking bisoprolol?
Alcohol can lower blood pressure and increase the risk of dizziness when combined with bisoprolol. Limit alcohol intake and avoid standing up suddenly after drinking.
Does bisoprolol cause weight gain?
Some people experience mild fluid retention and modest weight gain with bisoprolol, particularly at the start of treatment for heart failure. Significant or rapid weight gain (more than 2 kg in a week) should be reported to your doctor promptly.
⚠️ 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: