The weight loss drug market may soon be worth $100 billion.Eli Lilly (LLY -3.55%) is one of the world's top pharmaceutical companies, selling treatments for a wide range of diseases -- from diabetes to cancer. But one type of product has stood out in recent times and driven both revenue and share performance for the company. I'm talking about Lilly's weight loss drugs, which are bringing in billions of dollars in revenue.Lilly sells the compound tirzepatide in two forms: Mounjaro for type 2 diabetes and Zep ...