10 Most Profitable Drugs

Zyprexa (Eli Lilly)

Used to treat schizophrenia and bipolar disorder, Zyprexa is Eli Lilly's top-selling drug. In 2005, it had global sales of $4.7 billion. However, unlike other drugs on the list, Zyprexa experienced a significant decrease in annual growth -- a dismal 26.8 percent.

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