What Happens to Heart Valve Damage Caused by Diet Drugs after Treatment with the Drug Has Been Stopped?

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What is the problem and what is known about it so far?

In 1997, two drugs used to decrease appetite, fenfluramine and dexfenfluramine, were found to cause abnormalities of the heart valves in up to one third of people who had taken them. As a result, these drugs were withdrawn from the U.S. market. No one knows with certainty, however, …

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