Barbey at George Washington University points to these drugs as being more well-tried than newer drugs like Merck's Cozaar.

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There have been no test-runs, says Alain Barbey, Swissair's Italian manager.

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"The reverse side of the coin is that when new drugs are released, they do not have the proven efficacy that older drugs may, " Barbey says.

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Barbey, an assistant professor of medicine at Georgetown University, points to a recent study in The Journal of the American Medical Association that indicated that there may be heart problems associated with Vioxx and Celebrex.

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Although the new drugs boast some advantages, Dr. Barbey says these are by no means proven, and for many the older drugs, which keep the heart muscle from tensing up too much, may be just as good.

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