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    Friday, July 08, 2005

    FENFLURAMINE

    Fenfluramine

    ​Fenfluramine was the original "fen" in phen-fen (also called fen-phen). Fenfluramine binds to the serotonin transporter protein on cells and blocks the reuptake of serotonin just as Prozac does, but fenfluramine binds to a different domain compared to Prozac and is actually taken up into cells. The resulting high intracellular concentration of fenfluramine stimulates the fibrosis cascade resulting in primary pulmonary hypertension (PPH) or heart valve disease, just as with aminorex, phenformin and Sansert (Rothman et al Circulation 1999;100:869). There is no doubt that fenfluramine altered the heart valves in approximately one-third of the patients taking fenfluramine while they took the drug. A few patients progressed to actual valve failure. In the other patients, after the drug was stopped, the valves reverted to a functionally normal state. There is no further need to do echocardiograms in asymptomatic patients who took fenfluramine.


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    Posted by Michael Anchors, MD, PhD on Fri, Jul 08, 2005 11:49 am | [0] comments


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