This document discusses data and market exclusivity protections for pharmaceuticals in the European Union and United States. It provides background on the lengthy and costly drug development and approval process, and how data exclusivity helps incentivize pharmaceutical innovation by protecting clinical trial data and providing a period of market exclusivity. The EU generally provides 8 years of data exclusivity plus 2 additional years of market exclusivity, which can be extended to 11 years if a new therapeutic indication is approved. The US system is also described but to a lesser extent. The document examines how these exclusivity periods impact generic drug companies.