Pacira announces results of two data presentations for Exparel Pacira Pharmaceuticals announced results of two data presentations on the impact of Exparel on postsurgical opioid requirements in patients undergoing hysterectomy or mastectomy. The data were presented during two poster sessions at the annual meeting of the International Anesthesia Research Society, or IARS, being held in Honolulu March 21-24. The first study compared the efficacy of Exparel to bupivacaine HCl when infiltrated into the transversus abdominis plane, or TAP, to provide postsurgical analgesia following robotic assisted hysterectomy in 60 women. Blinded assessments of pain intensity, opioid intake and incidence of adverse events were taken for up to 72 hours after the procedure. In comparison to the bupivacaine HCl treatment group, patients who received TAP infiltration with Exparel had: Significantly decreased total opioid intake in first 72 hours; Significantly decreased incidence of nausea and vomiting in the first 72 hours; Significantly lower maximal pain intensity at all time points.