Overview

Beta-blockers are used to lower blood pressure and treat heart failure and heart rhythm problems. They're also used to relieve angina symptoms, such as chest pain or pressure. And they may decrease the chance of a second heart attack in people who already had a heart attack. They also slow the heart rate. And they reduce strain on the heart muscle and blood vessels.

They are also used for other health problems that aren't related to the heart. These include migraine headaches and tremors.

Before you start to take this medicine, make sure your doctor knows if you have severe asthma or frequent asthma attacks. Beta-blockers can make asthma symptoms worse.

What are some examples of beta-blockers?

Here are some examples of beta-blockers. For each item in the list, the generic name is first, followed by any brand names.

• atenolol (Tenormin)
• bisoprolol
• carvedilol
• metoprolol
• propranolol

This is not a complete list of beta-blockers.

Possible side effects

Beta-blockers can make some people feel tired, dizzy, or light-headed. They can also make asthma worse. In some people, heart rate or blood pressure can drop too low. If the medicine is stopped suddenly, high blood pressure, a heart attack, or dangerous heart rhythm may occur.

What to know about taking this medicine

Some cautions are:

• If you have diabetes, watch closely for symptoms of low blood sugar. Beta-blockers can hide your symptoms.
• If you have asthma, beta-blockers can make wheezing or shortness of breath worse.
• Do not suddenly stop taking a beta-blocker. This can cause high blood pressure, a heart attack, or a dangerous heart rhythm.
• Tell your doctor if you are pregnant, breastfeeding, or planning to become pregnant.
• Take your medicines exactly as prescribed. Call your doctor or nurse advice line if you think you are having a problem with your medicine.
• Check with your doctor or pharmacist before you use any other medicines. This includes ones you buy over the counter. Make sure your doctor knows all of the medicines and natural health products you take. Taking some medicines together can cause problems.