Unfortunately, unforeseen side effects apparently emerged when Redux and Pondimin were combined with another diet drug, phentermine.

FORBES: Wyeth's Diet Drug Risk Gets Fatter

Redux and Pondimin caused damage to heart valves when used with the diet drug phentermine as part of fen-phen.

FORBES: Disaster Of The Day: American Home Products

Wyeth shares tumbled today after the firm reported that more people than expected have opted out of a class-action settlement related to the diet drugs Redux and Pondimin, which were pulled from the market in 1997 after they were linked to heart problems.

FORBES: Magazine Article