MOUNTAIN VIEW, Calif., and CLEMENTON, N.J., July 22, 2008 (PRIME NEWSWIRE) -- Pharsight Corporation (Nasdaq:PHST), a leading provider of software, strategic consulting, and regulatory services for optimizing clinical drug development, and CRI Worldwide, a leading provider of clinical research services to the global pharmaceutical and biotech industries, today announced that they have formed an alliance to offer combined services including trial design, simulation, execution, analysis and reporting. The alliance provides a broader solution to customers and addresses the growing need for drug development companies to improve the efficiency in their performance and analysis of clinical trials.