Federal Trade Commission
said Monday it filed a complaint against
American Home Products
, accusing the drug makers of entering into an illegal anticompetitive agreement to keep low-cost, generic drugs off the market.
In an administrative complaint, the FTC claimed Schering-Plough illegally paid Upsher-Smith and American Home Products millions to delay the launch of their generic versions of K-Dur, a widely prescribed potassium chloride supplement made by Schering-Plough. The commission alleges the agreements have cost consumers more than $100 million.
A federal administrative law judge will hear the FTC's complaint.
Schering-Plough lost 53 cents, or 1.4%, to $36 in recent trading on the
New York Stock Exchange
. American Home Products fell $1.26, or 2.1%, to $57.49.