PRESS RELEASE

SILVER SPRING, Md., July 24 /PRNewswire-FirstCall/ -- United Therapeutics Corporation (Nasdaq: UTHR) announced today that it will release its 2008 second quarter financial results before the open of market on Thursday, July 31, 2008.

United Therapeutics will host a half-hour teleconference on Thursday, July 31, 2008, at 9:00 a.m. Eastern Time. The teleconference is accessible by dialing 1-800-603-1777, with international callers dialing 1-706-679-8129. A rebroadcast of the teleconference will be available for one week and can be accessed by dialing 1-800-642-1687, with international callers dialing 1-706-645-9291, and using access code 56186490.

This teleconference will also be webcast and can be accessed via United Therapeutics' website at http://ir.unither.com/events.cfm.

United Therapeutics Corporation is a biotechnology company focused on the development and commercialization of unique products to address the unmet medical needs of patients with chronic and life-threatening cardiovascular and infectious diseases and cancer. [uthr-g]

SOURCE United Therapeutics Corporation