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Without consulting your doctor, do not discontinue taking atenolol. Atenolol withdrawal symptoms include chest discomfort, abnormal heartbeat, and heart attack. Your dose will likely be gradually reduced by your doctor.

Why is this medication prescribed?

To treat high blood pressure, atenolol may be taken either on its own or in conjunction with other drugs. Additionally, it helps people survive a heart attack and prevents angina (chest pain). Atenolol belongs to a group of drugs known as beta blockers. It improves blood flow and lowers blood pressure by relaxing blood vessels and lowering heart rate.

High blood pressure is a common illness that, if left untreated, can harm the kidneys, brain, heart, blood vessels, and other organs. Heart disease, a heart attack, heart failure, a stroke, renal failure, eyesight loss, and other issues may result from damage to these organs. Making lifestyle modifications will help you control your blood pressure in addition to taking medication. These adjustments include quitting smoking, drinking alcohol in moderation, eating a diet low in fat and salt, keeping a healthy weight, and exercising for at least 30 minutes most days.

How should this medicine be used?

A tablet to be swallowed with food contains atenolol. Typically, it is taken once or twice a day. Take atenolol at around the same time(s) every day to make it easier for you to remember to take it. Ask your doctor or pharmacist to explain any instructions on your prescription label that you are unsure about following. Administer atenolol precisely as prescribed. Never take it in larger or less amounts or more frequently than directed by your doctor.

Although atenolol does not treat angina or high blood pressure, it does control them. You might not experience atenolol’s full benefits for one to two weeks. Even if you feel good, keep taking atenolol. Without consulting your doctor, do not discontinue taking atenolol.

Other uses for this medicine

Additionally, atenolol is occasionally used to treat heart failure, irregular heartbeat, alcohol withdrawal, and migraine headache prevention. Discuss the potential dangers of using this medicine for your illness with your doctor.

Ask your doctor or pharmacist for more details if you believe this drug should be used for something else.

What special precautions should I follow?

Before taking atenolol,

  • If you have an allergy to atenolol, any other medications, or any of the substances in atenolol tablets, let your doctor and pharmacist know right away. Request a list of the components from your pharmacist.
  • Inform your physician and pharmacist about all prescription and over-the-counter drugs, vitamins, dietary supplements, and herbal products you are taking. Incorporate any of the following: NSAIDs include indomethacin (Indocin, Tivorbex), calcium channel blockers like diltiazem (Cardizem, Cartia XT, Dilacor XR, Tiazac, others), verapamil (Calan, Covera-HS, Verelan, in Tarka), clonidine (Catapres, Kapvay, in Clorpres), and reserpine. Your physician might need to adjust the dosage of your drugs or keep a close eye on you for side effects.
  • If you have or have ever had diabetes, severe allergies, hyperthyroidism (an overactive thyroid gland), pheochromocytoma (a tumour that develops on a gland near the kidneys and may cause high blood pressure and fast heartbeat), heart failure, a slow heart rate, circulation issues, or heart or kidney disease, be sure to let your doctor know.
  • Inform your doctor if you are expecting, intend to get pregnant, or are nursing a baby. Call your doctor right away if you find out you’re pregnant while taking atenolol.
  • Inform your doctor or dentist that you are taking atenolol if you are having surgery, including dental surgery.
  • You should be aware that if you are allergic to several chemicals, using atenolol may make your symptoms worse and that standard doses of injectable epinephrine may not be effective in treating your allergies.

What special dietary instructions should I follow?

If your doctor advises a low-salt or low-sodium diet, strictly follow the instructions.

What should I do if I forget a dose?

If you miss a dosage, take it as soon as you recall. If the next dose is soon due, skip the missed one and carry on with your regular dosing plan. To make up for a missing dose, do not take a second one.

What side effects can this medication cause?

Atenolol’s negative effects could occur. If any of these symptoms are severe or do not go away, let your doctor know right once:

  • Dizziness
  • Lightheadedness
  • Tiredness
  • Drowsiness
  • Depression
  • Nausea
  • Diarrhea

Some adverse effects can be very harmful. Even though the following signs are unusual, you should call your doctor right once if you notice any of them:

  • Breathing difficulty
  • Hands, foot, ankles, or lower legs swelling
  • Gaining weight
  • Fainting

Other negative effects of atenolol are possible. If you experience any strange issues while taking this medicine, contact your doctor right away.

You or your doctor can submit a report to the Food and Drug Administration’s (FDA) MedWatch Adverse Event Reporting programme online or by phone if you have a serious side event (1-800-332-1088).

What should I know about storage and disposal of this medication?

Keep this medication tightly closed in the original container and out of the reach of children. Store it away from excessive heat and moisture at room temperature (not in the bathroom).

As many containers (such as weekly pill minders and those for eye drops, creams, patches, and inhalers) are not child-resistant and are simple for young children to open, it is crucial to keep all medications out of sight and out of reach of children. Always lock safety caps and promptly stash medication up and away from young children where it is out of their sight and reach to prevent poisoning.

Unused prescriptions must be disposed of carefully to prevent pets, kids, and other people from ingesting them. You should not, however, dispose of this medication in the toilet. Instead, utilising a medicine take-back programme is the easiest approach to get rid of your medication. To find out about take-back programmes in your area, speak with your pharmacist or the garbage/recycling department in your city. If you do not have access to a take-back programme, see the FDA’s Safe Disposal of Medicines website at for additional information.

In case of emergency/overdose

Call the poison control hotline at 1-800-222-1222 in the event of an overdose. Additionally, information can be found online at Call 911 right once if the person has collapsed, experienced a seizure, is having difficulty breathing, or cannot be roused.

Overdose symptoms could include:

  • Not enough energy
  • Having trouble breathing
  • Wheezing
  • Sluggish heartbeat
  • Fainting
  • Hands, foot, ankles, or lower legs swelling
  • Unexpected weight gain
  • Shakiness
  • Dizziness
  • A quick heartbeat
  • Confusion or perspiration
  • Distorted vision
  • Headache
  • Tongue tingling or feeling numb
  • Weakness
  • Excessive fatigue
  • Light colour
  • Abrupt hunger

What other information should I know?

Keep all of your doctor’s appointments. You should routinely monitor your blood pressure to see how atenolol is affecting you. Your physician could instruct you to take your pulse (heart rate). To learn how to take your pulse, ask your doctor or pharmacist. Call your doctor if your pulse is abnormally fast or slow.

No one else should take your medication. Any queries you may have regarding medication refills should be directed to your pharmacist.

You should keep a written record of every medication you take, including any over-the-counter (OTC) items, prescription drugs, and dietary supplements like vitamins and minerals. This list should be brought with you whenever you see a doctor or are admitted to the hospital. You should always have this information with you in case of emergencies.

Brand names

  • Tenormin®
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