Dexfenfluramine, marketed as dexfenfluramine hydrochloride under the name Redux, is a serotoninergic anorectic drug: it reduces appetite by increasing the amount of extracellular serotonin in the brain. It is the d-enantiomer of fenfluramine and is structually similar to amphetamine, but lacks any psychologically stimulating effects. 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 However, following multiple concerns about the cardiovascular side-effects of the drug, such approval was withdrawn and it was retired from the market in 1997...