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Atenolol belongs to a beta-blocker class of drugs used to treat angina and high blood pressure. Doctors also prescribe this medication to reduce the risk of death after cardiovascular events like heart attacks. Suitable for adults, this FDA-approved generic drug is available only in tablet form. Generic drugs are usually more cost-effective than the brand-name version. Additionally, this drug is not recommended for children’s use. Besides, careful dosage adjustments are required, which are only done by medical experts. 

Product Overview

Atenolol is a prescription medication that received FDA approval to treat high blood pressure (hypertension) and prevent chest pain (angina). It contains the active ingredient atenolol, a beta-blocker that helps lower blood pressure and the chances of heart attacks. Atenolol works by blocking specific receptors in the heart, slowing the heart rate, and reducing the heart’s workload.

Atenolol is available in various strengths, typically ranging from 25 mg to 100 mg. The medication should be taken orally, once or twice daily, either with or without meals, as instructed by a healthcare provider. It is suitable for adults and can be prescribed to older patients based on medical advice. 

Some common side effects of Atenolol may include dizziness, fatigue, and cold extremities. Patients should follow their doctor’s advice on managing these effects. In case of a missed dose, take it as soon as possible unless it’s close to the next dose; do not double up. Overdosing requires immediate medical attention. Store the drug at room temperature, away from moisture and light. For expert guidance, always talk to a healthcare provider.

Uses of Atenolol

It is used to:

  • Lower high blood pressure or hypertension
  • Reduce chest pain/angina
  • Minimizes the workload of heart muscles after a heart attack
  • Used as over-the-counter medication for migraines

Benefits of Atenolol

  • Used as an off-label medication for treating migraines.
  • Reduces the chances of heart attacks by lowering the heart’s workload.
  • Improves recovery in patients who have experienced a heart attack.
  • Manages irregular heartbeats.

Side Effects of Atenolol

Common side effects of Atenolol may include:

  • Constipation
  • Leg pain
  • Difficulty in breathing
  • Dizziness
  • Coldness in the hand or feet
  • Diarrhea
  • Tiredness
  • Headaches
  • Lower blood pressure
  • Chest pain 
  • Depressed mood
  • Reduced sex drive

[Note: This list is not exhaustive; if you notice any other symptoms that are not mentioned above, consult your doctor immediately.]

Atenolol Dosage

Forms & Strengths

Atenolol comes only in tablet form with the following strengths:

  • 25 mg
  • 50 mg
  • 100 mg

Recommended Dosages

Dosage for High Blood Pressure
  • Adult: The recommended dosage is 50 mg once daily. If needed, your doctor can gradually adjust your dose.
  • Children: The usage is not advised for children under 18 years of age.
  • Senior: Older patients have no specific dosage recommendations as their bodies process drugs very slowly. The starting dose of an adult may cause drug accumulation in the body. So, doctors usually prescribe lower dosages for this population. 
Dosage for Angina 
  • Adult: The recommended dosage is 50 mg once daily. If needed, your doctor can gradually adjust your dose.
  • Children: The usage is not advised for children under 18 years of age.
  • Senior: Older patients have no specific dosage recommendations as their bodies process drugs very slowly. The starting dose of an adult may cause drug accumulation in the body. So, doctors usually prescribe lower dosages for this population.
Dosage After a Heart Attack
  • Adult: When Atenolol is prescribed after a heart attack, its dosage is personalized based on the cause and effects of the heart attack. Besides, your doctor will closely monitor your BP and heart condition and will adjust the dosage accordingly. The starting dose of Atenolol is 100 mg once daily or can also be divided into two doses, followed by an adjustment when needed.
  • Children: The usage is not advised for children under 18 years of age.
  • Senior: Older patients have no specific dosage recommendations as their bodies process drugs very slowly. The starting dose of an adult may cause drug accumulation in the body. So, doctors usually prescribe lower dosages for this population.

How to Take Atenolol?

  • Stick to your doctor’s instructions. Do not exceed or subceed your doses. 
  • Take the medication by mouth with or without food one or two times unless directed otherwise.
  • Swallow the tablets as a whole with a full glass of water.
  • Do not crush or chew your tablets.
  • If you are having difficulty swallowing your medicines, talk to your doctor about this.
  • Take the medicines at the same time for effective results.
  • Do not discontinue the treatment even if you are feeling well.
  • The medication will take 1 to 2 weeks before it gives full benefits.

Missed Dose

  • If you miss a dose of your medication, do not panic; take the next dose whenever you remember.
  • If it is almost time for your next dose, skip the previous one and continue the regular dosing schedule.
  • Use medication apps or set reminders to avoid skipping any doses.
  • If you have doubts about this, feel free to ask your medical practitioner.

[Note: Do not take two doses of Atenolol at the same time to compensate for a missed dose. This can increase your risk of experiencing side effects.]


An overdose of Atenolol may cause symptoms like:

  • Weakness/fatigue
  • Nausea
  • Slow heart rate
  • Troubled breathing
  • Fainting

If you experience such symptoms, call your medical provider immediately or 911.

[Note: If you notice you have taken too much medication, call your local emergency number immediately.]

How Does Atenolol Work?

Atenolol is a beta-blocker, a class of medications with a similar mechanism of action and used to prevent similar conditions. Beta receptors can be found in heart cells that activate through adrenaline, causing blood pressure and heart rate to increase. Here comes the role of beta blockers. When a person takes Atenolol, the medication prevents adrenaline from affecting beta receptors in the blood vessels and heart. As a result, blood vessels start to relax. This whole process helps lower blood pressure and minimize chest pain. The drug also helps reduce the heart’s need for oxygen.

Important Safety Precautions

  • Avoid consuming apple or orange juice within 4 hours after taking your medication, as it may prevent your body from absorbing the drug. 
  • Do not stop the usage of Atenolol, as the sudden discontinuation may cause chest pain, high blood pressure, and an increased risk of heart attacks. 
  • Tell your doctor if you have any allergies to the medication’s ingredients.
  • Before using this medication, inform your medical professional about your medical history, especially of:
    • Heart rhythm problems
    • Breathing problems
    • Blood circulation issues
    • Heart failure
    • Kidney diseases
    • Muscle disease
  • Avoid driving or operating machinery that demands alertness, as the drug can make you feel dizzy.
  • Pregnant women are advised against using Atenolol as it may increase the risks to the unborn child. Consult with a doctor before making any decision.
  • Do not breastfeed when taking this medication, as it can interact with the breast milk and cause harm to the child.
  • If you are undergoing any medical surgery or procedure, inform your doctor or dentist about the products you use. This includes prescription drugs, nonprescription drugs, and herbal products.


  • Keep the drug at 20°C to 25°C.
  • Store the medication somewhere safe and away from children.
  • Do not keep it in damp areas like the bathrooms or near sinks.
  • Keep the medication away from moisture.
  • Do not flush the medication down the toilet.
  • Discard the product once it is past its expiration date.
  • Consult a medical practitioner or pharmacist to know how to properly dispose of the medication.
  • Read the product label thoroughly for detailed storage information.

Atenolol Interactions

  • Digoxin
  • Indomethacin
  • Bisoprolol
  • Carvedilol
  • Labetalol
  • Metoprolol
  • Nebivolol
  • Propranolol
  • Sotalol
  • Timolol
  • Nicardipine
  • Nifedipine

[Note: This list of interactions isn’t complete. Talk to your doctor if you notice any interaction with food, over-the-counter drugs, prescriptions, or supplements.]

Atenolol Alternatives 

  • Norvasc
  • Durlaza 
  • Cardizem CD 
  • Lasix 
  • Tiazac 
  • Microzide 
  • Coreg 

[Note: Your healthcare provider will choose which Atenolol alternative is best for you. Taking or consuming them by yourself may cause serious side effects.] 

Frequently Asked Questions

Can I experience anxiety or depression while taking Atenolol?

Yes, some people may experience anxiety or depression while taking Atenolol. These psychological effects are very rare but should be reported to a healthcare provider if they occur, as they may require medical attention or adjustment of the medication.

What are the contraindications of Atenolol?

Atenolol is contraindicated in patients with:

  • Severe bradycardia
  • Heart block
  • Cardiogenic shock, and 
  • Heart failure. 
  • Hypersensitivity

If you have any of these conditions, always consult your doctor before starting Atenolol.

What are the serious side effects of Atenolol?

Serious side effects of Atenolol include severe dizziness, slow heartbeat, fainting, breathing difficulties, and signs of heart failure like swelling ankles or feet. Immediate medical attention is required if any of these serious side effects occur.

Can I eat bananas while taking Atenolol?

No, you can not eat bananas while taking Atenolol, as this drug can increase the potassium levels in the body. Bananas, along with oranges, avocados, and tomatoes, are rich in potassium. To avoid conditions like hyperkalemia, follow your doctor’s instructions and avoid eating bananas.  

Our Guarantee

At Arctic Meds, we guarantee that you will find the most competitive prices for purchasing Atenolol through our platform. As the best Canadian online pharmacy, we are committed to delivering only the highest quality products. Each order is fulfilled through a reputable and licensed Canada pharmacy online, ensuring that every product we ship meets stringent standards of quality and authenticity. Our reliable service ships your medications directly from Canada right to your doorstep. For seamless access to buy Atenolol online from Canada at a low price contact us.


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