3/16/2010

Betrixaban, a Factor Xa inhibitor, appeared to reduce bleeding incidences more than warfarin when given in a 40-milligram dose to patients who had a stroke or nonvalvular atrial fibrillation. The midstage study recorded similar bleeding incidences between warfarin and 60-milligram, as well as 80-milligram, formulations of betrixaban, which is being developed by Merck & Co. and Portola Pharmaceuticals.

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