Atenolol ®
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Reviewed on Mar 20, 2026. by Dr Alexandra Cristina Cowell Writer & Clinical Content Reviewer Next review due on March 20, 2029.
Dr Alexandra Cristina Cowell

Last updated on Mar 20, 2026.

Daily tablet that can stop angina attacks before they start.

Atenolol is a pill you take for angina. It’s taken daily to prevent attacks, and works by relaxing blood vessels to slow your heart rate. You usually start by taking the lowest dose pill each day, which can be increased if you need greater angina control.

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Atenolol Atenolol

What is Atenolol?

Atenolol belongs to a group of medications called beta-blockers, which work by slowing down your heart rate. They’re used to treat heart-related conditions like angina, heart attack, and hypertension, but can also be used off-label to reduce physical anxiety symptoms.

You take Atenolol daily. As well as lowering your heart rate, the tablets reduce your heart’s oxygen demands, which can help prevent angina episodes.

How does Atenolol work?

Atenolol essentially makes your heart work less, which means it can pump blood around your body more easily. This action increases blood flow and reduces blood pressure,1 which is why Atenolol can be used to treat hypertension (high blood pressure).

By slowing your heart rate and reducing its oxygen demand, beta-blockers prevent angina attacks by helping your heart get the oxygen-rich blood it needs, with less effort.

What doses of Atenolol are there?

Atenolol tablets are available in three strengths: 25mg, 50mg and 100mg.

The starting dose is usually 50mg a day. Your physician might increase the amount you take each day if this isn’t enough to prevent angina episodes.

The maximum amount of Atenolol you can take each day is 200mg.

How long does Atenolol take to work?

Atenolol can start to work in your system shortly after you’ve taken your first pill, but it might be one to two weeks before you feel its full benefits.1

Atenolol is prescribed to prevent episodes of angina rather than treating them, so you should continue taking the pills even if you feel well.

Treated trusted source:

  1. Medline Plus (2023). Atenolol: MedlinePlus Drug Information. Medlineplus.gov.
Dr Alexandra Cristina Cowell 23938
This page was medically reviewed by Dr Alexandra Cristina Cowell on March 20, 2026. Next review due on March 20, 2029.

How we source info.

When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.

Atenolol Atenolol

How to take Atenolol

Swallow your pills whole with a drink of water. Avoid breaking or chewing them.

Your physician will tell you how much Atenolol you need to take each day.

If you forget to take your pill(s) at the usual time, you can take them as soon as you remember. Never take more than your usual dose of Atenolol to make up for a missed dose.

If you want to stop taking Atenolol, you’d need to do so gradually under your doctor’s supervision, which means you should avoid stopping treatment abruptly.

Dr Alexandra Cristina Cowell 23938
This page was medically reviewed by Dr Alexandra Cristina Cowell on March 20, 2026. Next review due on March 20, 2029.

How we source info.

When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.

Atenolol Atenolol

Atenolol isn’t suitable for everyone, and there are some things to be aware of when using it.

Here’s all the official info about your medication. If anything is unclear, let your physician know and they can talk with you about it.

 

Atenolol Atenolol

Atenolol: FAQ

Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.

Will angina improve without using medications like Atenolol?

Answer:
If you’ve been diagnosed with angina, it usually means you’re at risk of having a heart attack.2 Because of how serious this risk is, it’s unlikely that lifestyle changes alone will be enough to manage the condition, even though they can improve it over time.

Beta-blockers like Atenolol are designed to be used for long-term angina management when the condition is stable. But if your angina is unstable, you might be prescribed additional medications, like ones that provide instant relief when an attack starts.

Is Atenolol similar to other angina medications?

Answer:
Beta-blockers are a first-line treatment option for preventing angina. Atenolol is commonly used, and other types that are prescribed include metoprolol and bisoprolol.

For people that can’t tolerate beta-blockers, calcium channel blockers such as amlodipine and verapamil are sometimes used. These work by relaxing and widening blood vessels.

For relief at the onset of an acute angina attack, nitrate medications such as nitroglycerin are often prescribed.1

As well as recommending medications, your doctor might also suggest lifestyle changes, like eating well, quitting smoking, and limiting alcohol.

Do I need a prescription for Atenolol?

Answer:
You’ll need a prescription to start taking Atenolol. Your doctor will want to check it’s the safest, most suitable option for preventing your angina attacks. They’ll also decide and adjust how much you need to take to keep your symptoms under control.

Will Atenolol cause side effects?

Answer:
Common Atenolol side effects (that might affect up to one in ten people) include a slower heart rate, fatigue, cold hands and feet, and diarrhea.

Atenolol affects people differently though, so there’s no guarantee which side effects, if any, you’ll get. If you get any side effects that are hard to manage, let your doctor know.

Can I get Atenolol through private health insurance?

Answer:
Private health insurance plans tend to vary, and can depend on factors like age and location. So it’s always best to check with your provider so you know exactly what costs are covered when you want to start using a treatment.

If Atenolol isn’t fully or partially covered by your plan, but you still want to use it, you’ll have to pay for it yourself and order it from an online prescription and pharmacy service.

Treated trusted source:

  1. Kim, K.H., et al. (2023). Nitroglycerin. PubMed.
  2. National Heart, Blood and Lung Institute (2023). Angina (Chest Pain) – Living With.

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