what is in fen phen
fen-phen. n. A combination of the drugs fenfluramine and phentermine, formerly prescribed for weight loss, whose use was discontinued because of association with pulmonary hypertension.lass action settlement that their legal right to qualify for additional compensation is likely coming to a close by the end of this year, if not sooner. Deadline Expires This Year for Fen-Phen Class Action Members' Heart ... by PR.com (Press Releases).