Domestic Firms Eye on Original Drug Patent Expirations

The domestic pharmaceutical firms are strategically observing on the current and upcoming patent expirations of the blockbuster drugs, with their annual sales surpassing over $1 billion USD on an individual brand basis in the U.S. ethical market.

There are 10 such blockbuster drugs with their patent expirations by Year 2011, including Pfizer's Lipitor, Zoloft, Celebrex, Neurontin, which ha...