New Chemical Entity (NCE) products receive five years of market exclusivity after approval in the United States, during which the FDA will not accept or approve ANDA's or 505(b)(2) applications for generic versions; with an exception of ANDA or 505(b)(2) applications can be filed 1 year before NCE exclusivity expires with Paragraph IV certification with respect to one or more Orange Book listed patents.
NCE exclusivity expiry determines the pipeline selection of generic products as well 505b(2) products, here is a list of products and their analysis whose NCE exclusivity is expiring in 2014.