question: Compared to bupivacaine HCl what was the result of liposome bupivacaine on cumulative pain?
context: The median time to first postsurgical use of rescue opioid medication was significantly longer with liposome bupivacaine (9.3 hours) compared with bupivacaine HCl (6.4 hours; P = 0.013) and placebo (3.6 hours; P < 0.0001).