or fen/phen

noun Pharmacology.
  1. a drug that is a combination of fenfluramine and phentermine, formerly used in treating obesity but withdrawn from the market because of its potential to cause valvular heart disease.

Origin of fen-phen

First recorded in 1990–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

fen-phen in Medicine


  1. A combination of the drugs fenfluramine and phentermine, formerly prescribed for weight loss, whose use was discontinued because of association with pulmonary hypertension.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.