Atenolol/chlorthalidone (By mouth)

Introduction

Atenolol (a-TEN-oh-lol), Chlorthalidone (klor-THAL-i-done)

Treats high blood pressure. A lower blood pressure can reduce the risk of stroke and heart attack. This medicine contains a beta blocker and a diuretic (water pill).

Brand Name(s)

Tenoretic 100, Tenoretic 50

There may be other brand names for this medicine.

When This Medicine Should Not Be Used

Do not use this medicine if you have had an allergic reaction to atenolol, chlorthalidone, or a sulfonamide (sulfa drugs). Do not use this medicine if you are pregnant, are not able to urinate, or if you have certain heart problems. Talk with your doctor about what these heart problems are.

How to Use This Medicine

Tablet

  • Your doctor will tell you how much of this medicine to use and how often. Your dose may need to be changed several times in order to find out what works best for you. Do not use more medicine or use it more often than your doctor tells you to.
  • Carefully follow your doctor's instructions about any special diet.

If a dose is missed:

  • If you miss a dose or forget to use your medicine, use it as soon as you can. If it is almost time for your next dose, wait until then to use the medicine and skip the missed dose. Do not use extra medicine to make up for a missed dose.

How to Store and Dispose of This Medicine

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
  • Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
  • Keep all medicine away from children and never share your medicine with anyone.

Drugs and Foods to Avoid

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you are also using clonidine (Catapres®, Combipres®), digoxin (Lanoxin®, Digitek®), indomethacin (Indocin®), lithium (Eskalith®, Lithobid®), reserpine, insulin or diabetes medicine that you take by mouth (such as glimepiride, glyburide, metformin, Actos®, Janumet®, Januvia®), medicine to treat a heart rhythm problem (such as amiodarone, disopyramide, Cordarone®, Norpace®), or other blood pressure medicines (such as amlodipine, diltiazem, verapamil, Caduet®, Lotrel®).

Warnings While Using This Medicine

  • Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away.
  • Make sure your doctor knows if you are breastfeeding, or if you have kidney disease, liver disease, angina (severe chest pain), diabetes, gout, heart or blood vessel problems, heart failure, lung disease, lupus, overactive thyroid, mineral imbalance (such as high calcium or low potassium, sodium in the blood), or a history of asthma or allergies. Tell your doctor if you have an untreated adrenal problem called pheochromocytoma.
  • This medicine may make you dizzy, lightheaded, or drowsy. Avoid driving, using machines, or doing anything else that could be dangerous until you know how this medicine affects you.
  • Make sure any doctor or dentist who treats you knows that you are using this medicine. You may need to stop using this medicine several days before having surgery or medical tests.
  • Do not stop using the medicine without asking your doctor, even if you feel well. This medicine will not cure your high blood pressure, but it will help keep it in normal range. You may have to take blood pressure medicine for the rest of your life.
  • Your doctor will need to check your blood or urine at regular visits while you are using this medicine. Be sure to keep all appointments.

Possible Side Effects While Using This Medicine

Call your doctor right away if you notice any of these side effects:

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
  • Chest pain (may be related to your disease and not a side effect)
  • Confusion, weakness, uneven heartbeat, trouble breathing, numbness or tingling in your hands, feet, or lips
  • Dry mouth, increased thirst, muscle cramps, nausea, vomiting
  • Rapid weight gain, swelling in your feet, ankles, or legs

If you notice these less serious side effects, talk with your doctor:

  • Dizziness
  • Dry eyes
  • Mild skin rash
  • Tiredness

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088

Version Info

  • Last Reviewed on 06/12/2013

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This page was last updated: June 18, 2013

         
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