Which major pharmaceutical merger resulted in the company now responsible for both Lipitor (atorvastatin) and Viagra (sildenafil), two of the most commercially successful prescription medications in history?

In the ever-evolving landscape of pharmaceutical companies, strategic mergers and acquisitions reshape the industry regularly. These corporate maneuvers not only affect market dynamics but also impact healthcare delivery worldwide. This trivia question focuses on one of the largest pharmaceutical mergers in recent history that created a powerhouse in critical medical treatments and vaccines. Test your knowledge of how today's pharmaceutical giants came to be through strategic corporate consolidations.

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Pfizer's acquisition of Warner-Lambert in 2000
GlaxoSmithKline's formation through the merger of Glaxo Wellcome and SmithKline Beecham in 2000
Merck's acquisition of Schering-Plough in 2009
Johnson & Johnson's acquisition of Actelion in 2017