If you took the diet drug combination of fenfluramine and phentermine (often called fen-phen), or dexfenfluramine (known as Redux), we need to know that you’ve undergone a physical examination by your doctor before providing any dental treatment. This is because studies show that as many as 25 percent of those who have taken the drug developed heart abnormalities.

Although researchers aren’t exactly sure how the drug causes heart problems, the hearts of some people who have taken the drug now have thickened valves which can’t operate properly. Valves with this problem tend to leak, resulting in high blood pressure, lung problems, and, of course, heart problems. This ailment is also known as a “heart murmur.”

Since the discovery that the use of these drugs might lead to cardiovascular difficulties, the medicines have been pulled from the market, and those who took them have been urged to seek medical care. If you took either of these medications, you need

to see your doctor for a preliminary exam. Based on the results of this exam, your doctor may order further testing, including an echocardiogram.

Symptoms of a heart murmur may include shortness of breath. Any problem you experience that you believe may be related to your heart should be reported to your physician.

The dental connection to all this involves a serious illness known as bacterial endocarditis. This infection can occur when bacteria from the mouth enter the area around the heart. Damaged heart valves increase the risk of this disease, and for years patients with heart problems have taken antibiotics before having any dental work done -- including routine cleanings.

This type of precautionary measure may be necessary for any patient who has suffered heart damage from fen-phen or Redux. If you've taken either of these drugs, we urge you to see your physician to learn whether premeditation is necessary before you have any further dental treatment.