SILVER SPRING, Md. and RESEARCH TRIANGLE PARK, N.C.,
Sept. 7, 2017 /PRNewswire/ -- United Therapeutics Corporation (NASDAQ: UTHR) today announced that
the independent data monitoring committee (DMC) for the FREEDOM-EV study of Orenitram (treprostinil) extended-release tablets had
completed a pre-specified interim safety and efficacy analysis. The DMC did not identify any new safety concerns associated with
Orenitram therapy, and recommended that the trial be continued as planned without modification.
FREEDOM-EV is a Phase 3, international, multi-center, randomized, double-blind, placebo-controlled, clinical worsening study
of Orenitram in patients with pulmonary arterial hypertension (PAH) receiving background oral monotherapy study (a
phosphodiesterase type 5 inhibitor or an endothelin receptor antagonist). In accordance with the study protocol and DMC charter,
previous interim safety analyses were performed at scheduled intervals throughout the study and this interim safety and efficacy
analysis was performed after approximately 75% of the target 205 adjudicated clinical worsening (morbidity or mortality) events
occurred within the study. United Therapeutics is intentionally blinded to the interim analysis data and will remain blinded to
results of the study until after the study is completed.
The threshold for stopping the trial early for overwhelming efficacy was intentionally set high with the understanding that a
more robust result, based on a larger number of clinical worsening (morbidity or mortality) events, could be obtained by the
study continuing to completion.
The DMC's recommendation to continue as planned reflects its review of all available safety and efficacy data, and was made
independently. Neither United Therapeutics nor the U.S. Food and Drug Administration (FDA) has reviewed the interim clinical
trial results and neither participated in the DMC's closed session deliberation.
"We had stringent criteria for this interim analysis, and look forward to receiving the full results of the FREEDOM-EV study
during the second half of 2018," said Martine Rothblatt, Ph.D., Chairman and Chief Executive
Officer of United Therapeutics. "We remain optimistic that the FREEDOM-EV study is positioned for success based on our extensive
review of the existing and continually increasing body of data from clinical and real-world evidence studies, and we are
preparing for the study's conclusion in accordance with its statistical analysis plan."
About Orenitram
Orenitram is an extended-release, oral tablet form of treprostinil, which was launched commercially in the United States during the second quarter of 2014. Orenitram is the only FDA approved, orally administered
prostacyclin analogue, and is the only oral PAH prostacyclin class therapy approved in the United
States that is titratable to tolerability, without a dose ceiling. Orenitram was approved by the FDA in December 2013 for treatment of PAH patients to improve exercise capacity. Orenitram is not approved in major
markets outside the United States. The primary study that established efficacy included
predominately patients with functional class II-III symptoms and etiologies of idiopathic or heritable PAH (75%) or PAH
associated with connective tissue disease (19%).
Orenitram is contraindicated in patients with severe hepatic impairment. Abrupt discontinuation or sudden large reductions in
dosage of Orenitram may result in worsening of PAH symptoms. Orenitram inhibits platelet aggregation and increases the risk of
bleeding. The Orenitram tablet shell does not dissolve. In patients with diverticulosis, Orenitram tablets can lodge in a
diverticulum.
Concomitant administration of Orenitram with diuretics, antihypertensive agents, or other vasodilators increases the risk of
symptomatic hypotension. Orenitram inhibits platelet aggregation; there is an increased risk of bleeding, particularly among
patients receiving anticoagulants. Co-administration of Orenitram and the CYP2C8 enzyme inhibitor gemfibrozil increases exposure
to treprostinil; therefore, Orenitram dosage reduction may be necessary in these patients.
Orenitram is in Pregnancy Category C. Animal reproductive studies with Orenitram have shown an adverse effect on the fetus.
There are no adequate and well-controlled studies in humans. It is not known whether treprostinil is excreted in human milk or
absorbed systemically after ingestion. Because many drugs are excreted in human milk, patients should choose Orenitram or
breastfeeding. Safety and effectiveness in patients under 18 years of age have not been established. There is a marked increase
in the systemic exposure to treprostinil in hepatically impaired patients.
In the 12-week placebo-controlled monotherapy study, adverse reactions that occurred at rates at least 5% higher on Orenitram
than on placebo included headache, diarrhea, nausea, flushing, pain in jaw, pain in extremity, hypokalemia, and abdominal
discomfort.
About United Therapeutics
United Therapeutics Corporation is a biotechnology company focused on the development and commercialization of innovative
products to address the unmet medical needs of patients with chronic and life-threatening conditions. [uthr-g]
Forward-looking Statements
Statements included in this press release that are not historical in nature are "forward-looking statements" within the
meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, among others, statements
regarding the timing and outcome of the final FREEDOM-EV results and any related regulatory filings. These forward-looking
statements are subject to certain risks and uncertainties, such as those described in our periodic and other reports filed with
the Securities and Exchange Commission that could cause actual results to differ materially from anticipated results. Such
forward-looking statements are qualified by the cautionary statements, cautionary language and risk factors set forth in our
periodic reports and documents filed with the Securities and Exchange Commission, including our most recent Annual Report on Form
10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K. We claim the protection of the safe harbor contained in the
Private Securities Litigation Reform Act of 1995 for forward-looking statements. We are providing this information as of
September 7, 2017, and assume no obligation to update or revise the information contained in this
press release whether as a result of new information, future events or any other reason.
ORENITRAM is a registered trademark of United Therapeutics Corporation.
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SOURCE United Therapeutics Corporation