Technology | July 31, 2009

FDA Approves TYVASO Inhalation Solution for Pulmonary Arterial Hypertension

July 31, 2009 – United Therapeutics Corp. said yesterday the FDA approved TYVASO (treprostinil) Inhalation Solution for the treatment of pulmonary arterial hypertension (PAH) using the TYVASO Inhalation System (which includes the Optineb-ir device and accessories).

TYVASO is indicated to increase walking distance in patients with NYHA Class III symptoms associated with WHO Group I PAH, which includes multiple etiologies such as idiopathic and familial PAH as well as PAH associated with scleroderma and congenital heart disease.

In connection with the TYVASO approval, United Therapeutics has agreed to post-marketing commitments (PMC) to modify certain aspects of the TYVASO Inhalation System, perform a usability analysis and collect pharmacokinetic data to verify expected dosing with the modified device. The PMC should be completed no later than Oct. 31, 2010.

Additionally, United Therapeutics has agreed to a post-marketing requirement (PMR) to conduct a long-term observational study to evaluate the risk of oropharyngeal and pulmonary toxicities among patients using TYVASO. It should be completed no later than Dec. 15, 2013.

In the TRIUMPH-1 randomized, double-blind, 12-week placebo-controlled clinical trial, patients taking TYVASO in four daily inhalation sessions achieved a 20-meter improvement in six-minute walk distance over those taking placebo. The safety and effectiveness in patients with underlying lung disease has not been established. The most common side effects seen with TYVASO in the placebo controlled clinical study were cough, headache, nausea, dizziness, flushing, throat irritation, pharyngolaryngeal pain and diarrhea.

United Therapeutics plans to launch TYVASO in conjunction with its wholly-owned subsidiary, Lung Rx, Inc., in the United States at the beginning of September 2009.

For more information www.unither.com

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