Fen/phen is a combination of fenfluramine and phentermine, both of which are approved for short-term use, though not specifically in combination. Studies are planned of fen/phen users, as well as for several other chemically similar prescription drugs used in dieting.
Fen/phen warnings
FDA announced it plans to require warnings on labels of the popular prescription diet drug "fen/phen" after receiving reports that the drug combination can cause serious damage to heart valves.
Sep 30, 1997
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