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Potential Hazard of Serotonin Syndrome Associated With Dexfenfluramine Hydrochloride (Redux)-Reply

Jo Alene Dolan, PhD; Jess Amchin, MD, JD; Dominick Albano, RPh, MBA
JAMA. 1996;276(15):1220-1221. doi:10.1001/jama.1996.03540150022020.
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In Reply.  —The letter from Drs Schenck and Mahowald that discusses the potential for serotonin syndrome when using dexfenfluramine hydrochloride (Redux) with other serotoninergic agents warrants additional comment. The authors neglected to point out that the serotonin syndrome appears to be rare, even among patients taking serotoninergic drug combinations.1,2 Without their making this point, readers may be misled by their suggestion that large numbers of people are at risk for this syndrome. Serotonin syndrome has been reported more often with certain drug combinations such as MAOIs used with serotoninergic agents and is reported less frequently with other drug combinations.1 By not making this distinction, it appears that all the agents cited by the authors represent a similar risk when used with dexfenfluramine.The lack of reported cases of serotonin syndrome in patients receiving dexfenfluramine alone or in combination with other agents is reassuring, especially in view of its widespread clinical


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