Tenormin (Atenolol Tablets) Patient Information: Missed a Dose and What Should I Avoid at RxList

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May 25, 2012

Atenolol

Atrial Fibrillation »

What is atrial fibrillation?

Atrial fibrillation (AF) is the most common, abnormal rhythm of the heart.

The heart contracts (beats) and pumps blood with a regular rhythm, for example, at a rate of 60 beats per minute there is a beat every second. The heart may beat faster or slower with a shorter or longer interval between beats, but at any one rate the interval between beats is constant. This regular rhythm occurs as a result of regular electrical discharges (currents) that travel through the heart and cause the muscle of the heart to contract. In atrial fibrillation, the electrical discharges are irregular and rapid and, as a result, the heart beats irregularly and, usually, rapidly.

Atrial fibrillation is common; half a million new cases are diagnosed yearly in the U.S., and billions of dollars are spent annually on its diagnosis and treatment.

What causes atrial fibrillation?

Normal function of the he...

Read the Atrial Fibrillation article »

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Tenormin Patient Information including If I Miss a Dose

What happens if I miss a dose (Tenormin)?

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.

What happens if I overdose (Tenormin)?

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).

What should I avoid while taking atenolol (Tenormin)?

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.

What other drugs will affect atenolol (Tenormin)?

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.

Where can I get more information?

Your pharmacist can provide more information about atenolol.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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