Beta blockers:
- Slow the frequency of heart beats
- Expand blood vessels and ease the workload of the heart
- Are generally very effective at reducing blood pressure
- Reduce deaths from heart disease
Many beta blockers are now available, including:
- Propranolol (Inderal)
- Acebutolol (Sectral)
- Atenolol (Tenormin)
- Betaxolol (Kerlone)
- Carteolol (Cartrol)
- Metoprolol (Lopressor/Toprol XL)
- Nadolol (Corgard)
- Penbutolol (Levatol)
- Pindolol (Visken)
- Carvedilol (Coreg)
- Timolol (Blocadren)
The drugs may differ in their effects and benefits.
Problems with beta blockers
On the downside, studies suggest an increased risk of developing type 2 diabetes in people who take beta blockers. Also, people who already have diabetes should use caution taking beta blockers with other high blood pressure medications. This is because beta blockers may mask the symptoms of hyopglycemia (low blood sugar), which can be dangerous.
Because beta blockers can narrow bronchial airways, patients with asthma, emphysema, and chronic bronchitis should avoid beta blockers if possible. Some beta blockers tend to lower HDL cholesterol (the "good" cholesterol).
In general, the benefits of beta blocker therapy usually outweigh the side effects.
Side effects
Possible side effects include:
- Fatigue and lethargy
- Sexual dysfunction/erectile dysfunction
- Insomnia
- Vivid dreams and nightmares
- Depression
- Memory loss
- Confusion -- especially in the elderly
- Dizziness and light-headedness upon standing
- Lessened capacity for exercise
- Cold hands, fingers, feet, toes
- Decreased heart function
- Stomach and digestive problems -- diarrhea or constipation
- Asthma, emphysema, and bronchitis can be aggravated
 | If side effects occur, the patient should call a physician, but it is extremely important not to stop the drug abruptly. Angina, heart attack, and even sudden death have occurred in patients who discontinued treatment without gradual withdrawal.
|
|
Review Date:
4/6/2007
Reviewed By:
Glen Gandelman, MD, MPH, Assistant Clinical Professor of Medicine, New York Medical College, Valhalla, NY. Review Provided by VeriMed Healthcare Network.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997-
A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
