Bisoprolol – Effects, Dosage & Side Effects
Bisoprolol is a selective beta-blocker used to treat high blood pressure, heart failure, and coronary artery disease. It slows the heart rate and lowers blood pressure.
Things worth knowing about "Bisoprolol"
Bisoprolol is a selective beta-blocker used to treat high blood pressure, heart failure, and coronary artery disease. It slows the heart rate and lowers blood pressure.
What is Bisoprolol?
Bisoprolol is a cardioselective beta-1 adrenergic receptor blocker widely used in cardiology. It belongs to the class of beta-blockers and acts primarily on the heart, with minimal effects on the airways. Bisoprolol is a prescription-only medication commonly prescribed for long-term management of various cardiovascular conditions.
Indications
Bisoprolol is used in the treatment of the following conditions:
- Arterial hypertension (high blood pressure)
- Coronary artery disease (CAD) and stable angina pectoris
- Chronic heart failure with reduced ejection fraction (systolic heart failure)
- Heart rhythm disorders, particularly tachyarrhythmias (abnormally fast heart rates)
Mechanism of Action
Bisoprolol selectively blocks beta-1 adrenergic receptors in the heart. These receptors are normally activated by stress hormones such as adrenaline (epinephrine) and noradrenaline (norepinephrine), which increase heart rate and blood pressure. By blocking these receptors, bisoprolol produces the following effects:
- Reduction in heart rate (negative chronotropic effect)
- Decrease in cardiac contractility (negative inotropic effect)
- Lowering of blood pressure
- Reduction in the oxygen demand of the heart muscle
Due to its selectivity for beta-1 receptors, bisoprolol has significantly less effect on beta-2 receptors in the lungs and blood vessels compared to non-selective beta-blockers. This makes it better tolerated in patients with mild asthma or chronic obstructive pulmonary disease (COPD), although caution is still warranted in these groups.
Dosage
The dosage of bisoprolol depends on the indication and the individual tolerance of the patient. Typical dosages include:
- Hypertension and angina pectoris: 5–10 mg once daily, up to a maximum of 20 mg per day
- Chronic heart failure: Starting dose of 1.25 mg once daily, gradually titrated up to a maximum of 10 mg per day
Bisoprolol is generally taken in the morning, with or without food. The medication should never be stopped abruptly — the dose must be tapered gradually to avoid rebound effects such as worsening arrhythmias or angina.
Side Effects
Like all medications, bisoprolol can cause side effects. Common side effects include:
- Fatigue and tiredness
- Dizziness, especially when standing up (orthostatic hypotension)
- Cold hands and feet due to reduced peripheral circulation
- Slow heart rate (bradycardia)
- Sleep disturbances or vivid dreams
- Erectile dysfunction (uncommon)
Severe side effects such as a markedly low blood pressure or an excessively slow heart rate require immediate medical evaluation.
Contraindications
Bisoprolol must not be used in patients with:
- Severe bradycardia (heart rate below 60 beats per minute before starting therapy)
- High-degree AV block (second or third degree without a pacemaker)
- Decompensated heart failure
- Severe asthma or severe COPD
- Cardiogenic shock
- Known hypersensitivity to bisoprolol
Drug Interactions
Bisoprolol can interact with other medications. Clinically important interactions include:
- Other antihypertensive agents (additive blood pressure-lowering effect)
- Antiarrhythmic drugs (increased risk of bradycardia)
- Calcium channel blockers of the verapamil or diltiazem type (risk of AV block)
- Antidiabetic agents (bisoprolol may mask symptoms of hypoglycemia)
References
- Bisoprolol Summary of Product Characteristics – European Medicines Agency (EMA), current version.
- McDonagh T.A. et al. – 2021 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure. European Heart Journal, 2021.
- Williams B. et al. – 2018 ESC/ESH Guidelines for the management of arterial hypertension. European Heart Journal, 2018.
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