In the following video, Motley Fool health-care analyst David Williamson highlights one pharmaceutical company that has no interest in organic growth. Valeant Pharmaceuticals (BHC -0.99%) is continuing its growth-through-acquisition strategy with the purchase of Obagi Medical Products (NASDAQ: OMPI), its 21st acquisition since 2011, for $344 million. David tells investors why this is a win for both parties, and how they should think of the investing thesis behind Valeant.