Atenolol
Tenormin (atenolol) is a beta-blocker medication used to treat high blood pressure, angina (chest pain), and certain heart rhythm disorders. It works by blocking the effects of adrenaline on the heart, reducing heart rate and the force of heart contractions, which helps lower blood pressure and decrease the heart's workload.
Tenormin is a beta-blocker that lowers blood pressure and treats chest pain by reducing heart rate and workload.
Key facts at a glance
- RxNorm
- 152413
- Generic
- Tenormin
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Tenormin is primarily prescribed for hypertension (high blood pressure), chronic stable angina pectoris, and to improve survival after a heart attack. It may also be used off-label for certain irregular heartbeat conditions.
Tenormin belongs to the beta-blocker class of medications. It selectively blocks beta-1 adrenergic receptors in the heart, which decreases heart rate, reduces the force of heart contractions, and lowers blood pressure. This helps the heart work more efficiently and reduces oxygen demand.
Tenormin should not be stopped abruptly, as this can worsen chest pain or cause heart rhythm problems. Common side effects may include fatigue, cold hands/feet, dizziness, and slow heartbeat. It may not be suitable for patients with certain heart conditions, asthma, or severe peripheral vascular disease. Always follow your healthcare provider's instructions regarding dosing and monitoring.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 9, 2026. · Read our editorial policy