PRESS RELEASE

SILVER SPRING, Md., July 25 /PRNewswire-FirstCall/ -- United Therapeutics Corporation (Nasdaq: UTHR) today announced it would release its second quarter 2006 financial results before the open of market on Tuesday, August 1, 2006.

United Therapeutics will host a half-hour teleconference on Tuesday, August 1, 2006, at 9:00 a.m. Eastern Time. The teleconference is accessible by dialing 1-800-603-1777, with international dialers calling 1-706-679-8129. A rebroadcast of the teleconference will be available for one week following the teleconference by dialing 1-800-642-1687, with international callers dialing 1-706-645-9291, and using access code 3004979

United Therapeutics is a biotechnology company focused on the development and commercialization of innovative therapeutic products for patients with chronic and life-threatening cardiovascular, cancer and infectious diseases.

SOURCE United Therapeutics Corporation