Blockbuster Drugs

For the world''s largest prescription drug manufacturers, the last few years have been a harrowing time. Recently, Pfizer''s Lipitor, GlaxoSmithKline''s Advair, AstraZeneca''s Seroquel, and Sanofi-Aventis and Bristol-Myers Squibb''s Plavix all came off patent in the crucial U.S. market. This so-called "patent cliff" meant hundreds of billions of dollars in lost revenue and has pharmaceutical devel...