Atenolol and chlorthalidone

Name: Atenolol and chlorthalidone

Atenolol and Chlorthalidone Overview

Atenolol and chlorthalidone is a prescription medication used to treat high blood pressure. This medication is a single product containing 2 medications: atenolol and chlorthalidone. Atenolol component belongs to a group of drugs called beta blockers. It works to decrease blood pressure and heart rate by blocking beta receptors in the body. Chlorthalidone component belongs to a group of drugs called diuretics ("water pills") which help the body get rid of excess fluid by increasing the amount of salt and water the kidneys remove from the blood.

This medication comes in a tablet form and is typically taken once daily with or without food. 

Common side effects include cold limbs, depression, and difficulty breathing. 

Atenolol and chlorthalidone can also cause dizziness and tiredness.Do not drive or operate heavy machinery until you know how this medication affects you. 

Atenolol and Chlorthalidone Brand Names

Atenolol and Chlorthalidone may be found in some form under the following brand names:

  • Tenoretic

Atenolol and Chlorthalidone Drug Class

Atenolol and Chlorthalidone is part of the drug class:

  • Beta blocking agents, selective

Atenolol and Chlorthalidone Usage

  • Take atenolol and chlorthalidone exactly as prescribed. 
  • Atenolol and chlorthalidone comes in a tablet form and is taken by mouth once daily with or without food. 

Other Requirements

  • Store at controlled room temperature, 68-77°F (20-25°C).
  • Dispense in well-closed, light-resistant container.
  • Keep this and all medications out of the reach of children.

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

Commonly used brand name(s)

In the U.S.

  • Tenoretic 100
  • Tenoretic 50

Available Dosage Forms:

  • Tablet

Therapeutic Class: Beta-Adrenergic Blocker, Cardioselective/Thiazide Combination

Pharmacologic Class: Beta-Adrenergic Blocker, Cardioselective

Chemical Class: Thiazide Related

What are some other side effects of Atenolol and Chlorthalidone?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

  • Dizziness.
  • Upset stomach or throwing up.
  • Not hungry.
  • Hard stools (constipation).
  • Feeling tired or weak.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at

If OVERDOSE is suspected

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Index Terms

  • Atenolol/Chlorthalidone
  • Chlorthalidone and Atenolol

Use Labeled Indications

Treatment of hypertension with a cardioselective beta-blocker and a diuretic


Safety and efficacy have not been established in patients younger than 18 years.

Consult WARNINGS section for additional precautions.