Pfizer has finalized plans to acquire Metsera for $4.9 billion, strategically positioning itself in the booming weight loss drug market projected to reach $100 billion by 2030. This acquisition follows Pfizer's earlier consideration of Viking Therapeutics, whose VK2735 drug demonstrates significant weight loss potential but faces safety and dropout concerns. The competitive landscape is dominated by Eli Lilly and Novo Nordisk, both of which successfully capitalize on the high demand for obesity treatments as they generate substantial revenues from their existing products.