Only 2 products received generic drug approval of Nexium

The patent of Nexium (S-omeprazole magnesium • AZ) expires on July 22. However, despite the expiration of patent ahead, only 2 products received generic drug approval.

First reason is because of follow-up patent of Nexium. Nexium's core patent associated with magnesium salts expires on July 22, but its formulation technology patent is valid till June 2015, and trihydrate patent is valid till M...