In honor of March Madness, the Motley Fool's health-care team assembled their own bracket consisting of the 16 largest and best pharmaceutical and biotech stocks on the market. The series kicks off with a tough matchup between two of the biggest players in the diabetes space: Sanofi (NYSE:SNY) and Eli Lilly (NYSE:LLY). To learn the bull and bear cases for each stock -- and to see which stock will move on to the Elite Eight -- watch the following video.

David Williamson, Max Macaluso, Ph.D., and The Motley Fool have no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.