Pharsight Corporation: Fourth Quarter 2004 Earnings Conference Call.

Business Editors

MOUNTAIN VIEW, Calif.--(BUSINESS WIRE)--April 20, 2004

Pharsight Corporation (OTCBB:PHST), a leading provider of software products and consulting services that help pharmaceutical and biotechnology companies improve their decision-making in drug development, will hold its quarterly conference call to discuss fourth quarter results on Tuesday, April 27, 2004 at 5:00 p.m. Eastern Time (2 p.m. Pacific Time).

This call is being webcast by CCBN and can be accessed through a link on the investor relations' financial events page of the companies website at www.pharsight.com. A replay of the webcast will be available until July 20, 2004.

The webcast is also being distributed over CCBN's Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through CCBN's individual investor center at www.fulldisclosure.com or by visiting any of the investor sites in CCBN's Individual Investor Network. Institutional investors can access the call via CCBN's password-protected event management site, StreetEvents (www.streetevents.com).

About Pharsight Corporation

Pharsight Corporation develops and markets products and services that help pharmaceutical and biotechnology companies improve their decision-making in drug development and commercialization. By integrating scientific, clinical and business decision criteria into a dynamic, model-based methodology, Pharsight helps its customers optimize the value of their drug development programs and portfolios from discovery to post-launch marketing and any point in between. Pharsight Corporation is headquartered in Mountain View, California.