This document discusses the competitive advantages and strategy formulation processes of three large pharmaceutical companies: Novartis, Pfizer, and Sanofi-Aventis. It outlines how Novartis was formed through a merger and leads in various therapeutic areas. Pfizer invests heavily in research and develops blockbuster drugs. Sanofi-Aventis has a large diversified drug portfolio and global vaccine leadership. The strategy formulation process for Novartis is also summarized, including its mission to discover and market innovative products, objectives like eliminating diseases, and potential strategies like investing in R&D.