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Arena Pharmaceuticals Completes Phase 1b Clinical Trial Evaluating APD811 for Pulmonary Arterial Hypertension
Date:8/28/2013

SAN DIEGO, Aug. 28, 2013 /PRNewswire/ -- Arena Pharmaceuticals, Inc. (NASDAQ: ARNA) today announced the completion of a Phase 1b clinical trial for APD811, an investigational oral prostacyclin (IP) receptor agonist intended for the treatment of pulmonary arterial hypertension (PAH). The company plans to initiate a Phase 2 clinical trial for APD811 in the first quarter of 2014.

"Arena's internal GPCR-focused efforts led to the discovery of this novel drug candidate," said William R. Shanahan, M.D., Arena's Senior Vice President and Chief Medical Officer. "We believe APD811 is a promising new chemical entity that could improve current patient care by providing an oral option for IP-targeted therapy. Based on the encouraging Phase 1 results, we look forward to initiating the Phase 2 program early next year."

This randomized, double-blind and placebo-controlled Phase 1b clinical trial evaluated the safety, tolerability and pharmacokinetics of multiple-ascending doses of APD811. Arena previously evaluated single-ascending doses of APD811 in a Phase 1a clinical trial.

In the Phase 1b clinical trial, 40 healthy volunteers received APD811 and 15 received placebo, and the safety profile of APD811 was characteristic of IP receptor agonists. No serious adverse events were observed, and the most frequent treatment-emergent adverse events were headache, nausea and jaw pain. The results of the Phase 1 program led to the decision to proceed with Phase 2 development of APD811, which will include further exploration of dosing regimens in PAH patients. 

About Pulmonary Arterial Hypertension (PAH)PAH is a progressive, life-threatening disorder characterized by increased pressure in the arteries that carry blood from the heart to the lungs. The increased pressure strains the heart, which can limit physical act
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SOURCE Arena Pharmaceuticals, Inc.
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