Do drug benefit managers reduce health costs?

Bottles of prescription drugs as labeled Lipitor, TriCor, Plavix, Singulair, Lexapro and Avapro are displayed at pharmacy benefit manager Medco Health Solutions Inc., in Willingboro, N.J. / Matt Rourke, AP While all the cutting goes on in health care, one of the biggest and least understood players is getting bigger and richer.

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