AstraZeneca filed its motion before the Panel in May 1999, requesting coordination of the pretrial proceedings of the patent actions in New York.

There are presently patent infringement cases pending against Andrx Pharmaceuticals, Inc., Genpharm, Inc., Kremers Urban Development Co/Schwarz Pharma, Inc., and Cheminor Drugs, Ltd./Reddy-Cheminor, Inc. The lawsuits were filed in Florida, New York, Wisconsin and New Jersey respectively. The lawsuits are the results of Abbreviated New Drug Applications (ANDAs) filed by the four companies with the FDA concerning their intent to market a generic omeprazole product in the US.

Omeprazole is marketed in the US under the brand Prilosec and is marketed internationally as Losec®.