MOUNTAIN VIEW, Calif., Sept. 11 /PRNewswire/ -- Pharsight Corporation, a leading provider of software and strategic services for optimizing clinical drug development, today announced that it has signed another Top 50 Pharmaceutical company as a Pharsight Knowledgebase Server (PKS(TM)) customer. The company, one of the largest global healthcare companies headquartered in Japan, has signed an agreement for PKS user licenses and associated services. This new agreement brings Pharsight’s total number of PKS customers to 18. The new customer will also upgrade its existing licenses of WinNonlin®, Pharsight’s tool for non-compartmental analysis of pharmacokinetic and pharmacodynamic (PK/PD) data. The new PKS customer will use PKS as a central repository for PK/PD data and will access PKS from research and development sites in the US and Japan.