Educational Medication GuideRxClass: Beta Blocker

Atenolol

Generic Name: Atenolol

Common Brand Names: Tenormin

Dosage Form:Tablet

Route:Oral

Pregnancy Category:D

Last Reviewed:9/21/2026

Uses & Medical Indications

Treat high blood pressure

Medical Conditions Treated:

Hypertension, angina

Work Mechanism & Pharmacology

How It Works

Patient Overview of Work Mechanism

Atenolol relaxes tight blood vessels and supports regular cardiac pumping, keeping blood pressure within a healthy range and protecting heart health.

Clinical Mechanism of Action (MoA)

Atenolol lowers elevated blood pressure and relieves myocardial workload by inducing systemic vasodilation, antagonizing adrenergic sympathetic tone, or inhibiting the renin-angiotensin-aldosterone axis.

Primary TargetAtenolol

Therapeutic FamilyAntihypertensive

Administration RouteOral

Dosage & Administration Guidelines

Adult Dosage

50-100 mg daily

Pediatric Dosage

Safety not established

Elderly / Geriatric Considerations

Start at lower dose

Maximum Dose Limit

100 mg/day

Renal Impairment:

Reduce dose in impairment

Hepatic Impairment:

N/A

Side Effects & Safety Warnings

Common Side Effects

Fatigue, dizziness, bradycardia

Serious Adverse Reactions

Heart block, bronchospasm

Contraindications:

Sinus bradycardia, heart block

Important Warnings & Precautions:

Do not abruptly discontinue

Interactions (Drugs, Food & Alcohol)

Drug-Drug Interactions:

Calcium channel blockers, Digoxin

Food & Dietary Interactions:

N/A

Alcohol Interaction Warning:

May increase drowsiness

Pregnancy & Breastfeeding Safety

Pregnancy Safety

Risk of fetal harm

Breastfeeding / Lactation

Use caution

Patient Counseling & Practical Advice

How to Take:

Do not stop suddenly

What to Do if You Miss a Dose:

Take if remembered same day

Recommended Monitoring & Lab Tests:

Blood pressure, heart rate

Emergency Medical Warning

When to Seek Urgent Medical Attention

Seek immediate emergency medical care (call emergency services or proceed to the nearest emergency department) if you experience signs of a life-threatening allergic reaction (anaphylaxis: facial, lip, tongue, or throat swelling causing airway obstruction), severe cutaneous blistering with skin peeling, sudden intense chest pain, or symptoms of overdose.

Emergency Safety Protocol: If an intentional or accidental overdose is suspected, contact your regional Poison Control Center or emergency services immediately. Do not induce vomiting unless strictly advised by emergency healthcare personnel.

Educational Sources & References

Content for Atenolol was synthesized from standardized public health monographs, official pharmacopoeias, and health authorities:

Central Drugs Standard Control Organization (CDSCO) — National List of Essential Medicines
World Health Organization (WHO) — Model List of Essential Medicines
Indian Pharmacopoeia Commission (IPC) — Indian Pharmacopoeia Drug Monographs
National Health Service (NHS) — Medicines A to Z Clinical Guidelines

Published by: Medi Info Hub TeamLast Updated: 10/19/2026

The information provided on this website is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.