Dexfenfluramine was, for some years in the mid-1990s, approved by the United States Food and Drug Administration for the purposes of weight loss. However, following multiple concerns about the cardiovascular side-effects of the drug, the FDA withdrew the approval in 1997.
Dexfenfluramine was once approved by the U.S. Food and Drug Administration for use as a weight-loss drug in the mid-1990s.  However, due to concerns about its cardiovascular effects, the FDA withdrew its approval in 1997.