Apotex Successfully Invalidates Patent on Nexium
AstraZeneca has been selling Nexium in Canada for 13 years. It is prescribed to treat ulcers, gastroesophageal reflux disease (GERD) and related diseases. The active ingredient in Nexium is esomeprazole, one of the enantiomers of omeprazole. Omeprazole is also prescribed to treat these same diseases. Canadian patent no. 2,139,653 (the 653 patent) claims esomeprazole with […]