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Since the turn of the millennium, Pfizer has embarked on a series of mega-mergers, gobbling up Warner-Lambert in 2000, Pharmacia and Upjohn in 2002, Wyeth in 2009, and Medivation in 2016. In 2014 the company made an offer of around $100 billion to acquire UK firm AstraZeneca (which at the time was going through a rough patch ).
Shots: Drug patent expiry is when a patent granted to a pharmaceuticalcompany for a particular drug expires, allowing other companies to produce and sell generic versions Like every other utility patent, pharmaceuticals also get market exclusivity of 20 years.
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