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POZEN Submits New Drug Application For PA32540/PA8140

About the Phase 3 Studies

The two Phase 3, double-blind, randomized, multicenter studies enrolled 1,049 subjects who had been prescribed daily aspirin (325 mg) for greater than or equal to three months for secondary prevention of cardiovascular events. The primary endpoint was the cumulative observed incidence of gastric ulcers over six months. Secondary endpoints included cumulative incidence of gastric and duodenal ulcers, discontinuation due to pre-specified upper gastrointestinal (UGI) adverse events and heartburn resolution. Subjects were randomly assigned to once-daily treatment with PA32540 or 325 mg of enteric-coated aspirin. Endoscopic assessments were performed at screening and at one, three and six months. Major adverse cardiac events (MACE) were reviewed and adjudicated by an independent, blinded endpoint committee composed of Cardiologists.

Each study achieved its individual primary endpoint, and also met all secondary endpoints. Results from the combined data from the two studies demonstrated that patients on PA32540, compared to those on enteric-coated aspirin (325 mg), were able to stay on therapy longer due to fewer discontinuations due to any adverse events (6.7% vs. 11.2%). Discontinuations due to pre-specified UGI events were lower in subjects taking PA32540 compared to subjects taking enteric-coated aspirin (1.5% vs. 8.2% respectively, p<0.001).

In the combined data from the two trials, 85.1% of subjects on enteric-coated aspirin (325 mg) reported adverse events compared to 71.8% of subjects on PA32540. The most commonly reported adverse events with PA32540 and enteric-coated aspirin (325 mg) were of the GI tract and include dyspepsia (11.3% vs. 30.2%), erosive gastritis (11.5% vs. 26.3%), and gastritis (17.5% vs. 16.0%), respectively. The incidence and nature of adjudicated MACE such as heart attacks was similar between the two treatment arms: 9 subjects (1.7%) on PA32540 experienced adjudicated MACE compared to 13 subjects (2.5%) on aspirin (325 mg).

About PA

POZEN is creating a portfolio of integrated aspirin therapies - the PA product platform. The products in the PA portfolio are intended to significantly reduce gastrointestinal (GI) ulcers and other GI complications compared to taking enteric-coated or plain aspirin alone.

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