Definition of Beta Blockers

A beta blocker is a medication used to treat heart problems and high blood pressure. It works by blocking the harmful effects of the stress hormones epinephrine and norepinephrine on the heart and by slowing your heart rate.

Treatment

• Beta blockers are prescribed for many different heart problems. They are used to treat high blood pressure, irregular heartbeat, congestive heart failure and to prevent a second heart attack in people who've already had one. They can also be used to treat migraine headaches.

Generic and Brand Names

• Some commonly prescribed beta blockers are atenolol (brand name Tenormin), metoprolol (Lopressor and Toprol XL) and propranolol (Inderal).

Beta Blockers and Diabetes

• Beta blockers can hide the warning signs of low blood sugar. When your blood sugar is low, your heart rate may not increase because of the beta blocker.

Possible Side Effects

• Since beta blockers slow your heart rate, some people feel dizzy, lightheaded or out of breath. In most cases, this feeling goes away after taking the medication for a few days. Talk to your doctor if you experience side effects.

Call Your Doctor

• If you have unexplained weight gain, retain fluid in your hands or feet, have trouble breathing or have a heart rate slower than 50 beats per minute, contact your doctor right away.

When to Take Beta Blockers

• Beta blockers are usually taken once or twice each day. Try to take it at the same time every day. Never take a double dose, even if you missed an earlier one.