About

Atenolol is a medicine used to treat high blood pressure and certain heart conditions. It belongs to a class of drugs called beta-blockers. It works by slowing down your heart rate and reducing the heart's workload, helping to lower blood pressure and prevent chest pain.

Atenolol is commonly prescribed for:

High blood pressure (hypertension)

Angina (chest pain)

Preventing heart attacks

Managing certain abnormal heart rhythms

Reducing symptoms of anxiety or migraines (off-label)

Atenolol is available in:

Tablets (25 mg, 50 mg, 100 mg)

How and When to Use It

Take atenolol exactly as prescribed by your doctor.

Dosage: The dose depends on your condition and response to treatment, usually taken once daily.

Take tablets with a glass of water. You can take it with or without food, but try to take it at the same time each day.

Do not stop taking atenolol suddenly — this can worsen chest pain or trigger heart problems. Always check with your doctor first.

Contraindications

Do not take atenolol if you have:

Allergy to atenolol or other beta-blockers

Severe slow heart rate (bradycardia)

Severe heart block or heart failure not controlled by other medications

Severe asthma or chronic obstructive pulmonary disease (COPD) that may be worsened by beta-blockers

Severe peripheral artery disease

Side Effects

Like all medicines, atenolol can cause side effects, although not everyone gets them.

Common side effects:

Tiredness or fatigue

Cold hands or feet

Dizziness or lightheadedness

Slow heart rate

Serious side effects — seek medical attention immediately:

Severe dizziness or fainting

Shortness of breath or swelling of ankles/feet

Worsening chest pain

Severe allergic reactions (rash, swelling, difficulty breathing)

Always inform your doctor if you experience unusual symptoms, especially heart- or lung-related problems.

Pregnancy, Breastfeeding & Fertility

Atenolol should only be used during pregnancy if clearly needed, as it may affect the baby’s growth.

Atenolol can pass into breast milk; consult your doctor before breastfeeding.

There is no evidence that atenolol affects fertility in men or women.

Interactions With Other Medications

Some medicines can increase side effects or affect how atenolol works. Tell your doctor if you take:

Other blood pressure medications (e.g., ACE inhibitors, calcium channel blockers)

Heart medications like digoxin or antiarrhythmics

Insulin or oral diabetes medications

NSAIDs (e.g., ibuprofen, naproxen)

Some antidepressants or asthma inhalers

Frequently Asked Questions