DULUTH, GA - JULY 9: A Merck & Co. sign sits in front of a Georgia facility July 9, 2002 in Duluth, Georgia. Merck is expected to proceed with the twice-delayed IPO of Merck-Medco this week despite a record of more than $12.4 billion in revenue over the past three years from its pharmacy benefits unit. The money in question, co-payments paid by consumers to their retail pharmacy, was never collected. The pharmacy keeps the co-payment. (Photo by Erik S. Lesser/Getty Images)
