What is atenolol?
Atenolol is in a group of drugs called beta-blockers. Beta-blockers affect the heart and circulation (blood flow through arteries and veins).
Atenolol is used to treat angina (chest pain) and hypertension (high blood pressure). It is also used to treat or prevent heart attack.
Atenolol may also be used for purposes other than those listed in this medication guide.
You should not use this medication if you are allergic to atenolol, or if you have certain heart conditions such as slow heartbeats, or heart block.
Before taking atenolol, tell your doctor if you have:
- asthma, bronchitis, emphysema;
- low blood pressure;
- a heart problem such as heart block, sick sinus syndrome, slow heart rate, or congestive heart failure;
- liver or kidney disease;
- a thyroid disorder;
- myasthenia gravis;
- pheochromocytoma; or
- problems with circulation (such as Raynaud's syndrome).
If you have any of these conditions, you may need a dose adjustment or special tests to safely take this medication.
FDA pregnancy category D. This medication can cause harm to an unborn baby. Do not use atenolol if you are pregnant. Tell your doctor if you become pregnant during treatment. Use an effective form of birth control while you are using this medication.
Atenolol can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
Atenolol can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid drinking alcohol, which could increase drowsiness and dizziness while you are taking atenolol.
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Seek emergency medical attention if you think you have used too much of this medicine.
Overdose symptoms may include uneven heartbeats, shortness of breath, bluish-colored fingernails, dizziness, weakness, fainting, or seizure (convulsions).
Take the missed dose as soon as you remember. If your next dose is less than 8 hours away, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.
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Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have any of these serious side effects:
- slow or uneven heartbeats;
- feeling light-headed, fainting;
- feeling short of breath, even with mild exertion;
- swelling of your ankles or feet;
- nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
- depression; or
- cold feeling in your hands and feet.
Less serious side effects may include:
- decreased sex drive, impotence, or difficulty having an orgasm;
- sleep problems (insomnia);
- tired feeling; or
- anxiety, nervousness.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
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Before taking atenolol, tell your doctor if you are using:
- allergy treatments (or if you are undergoing allergy skin-testing);
- amiodarone (Cordarone, Pacerone);
- clonidine (Catapres);
- digoxin (digitalis, Lanoxin);
- disopyramide (Norpace);
- guanabenz (Wytensin);
- an MAO inhibitor such as isocarboxazid (Marplan), tranylcypromine (Parnate), phenelzine (Nardil), or selegiline (Eldepryl, Emsam);
- a diabetes medication such as insulin, glyburide (Diabeta, Micronase, Glynase), glipizide (Glucotrol), chlorpropamide (Diabinese), or metformin (Glucophage);
- a heart medication such as nifedipine (Procardia, Adalat), reserpine (Serpasil), verapamil (Calan, Verelan, Isoptin), diltiazem (Cartia, Cardizem);
- medicine for asthma or other breathing disorders, such as albuterol (Ventolin, Proventil), bitolterol (Tornalate), metaproterenol (Alupent), pirbuterol (Maxair), terbutaline (Brethaire, Brethine, Bricanyl), and theophylline (Theo-Dur, Theolair); or
- cold medicines, stimulant medicines, or diet pills.
This list is not complete and there may be other drugs that can interact with atenolol. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.
Tenormin and atenolol
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Copyright 1996-2004 Cerner Multum, Inc. Version 2.05. Revision date 8/23/04