This was a Phase 2, parallel-group, active-control, randomized, double-blind study conducted to evaluate a single local administration of low dose or high dose of SKY0402 compared with 75 mg of bupivacaine HCl (i.e., Marcaine® 0.5%) in women undergoing bilateral, cosmetic, sub-muscular, augmentation mammoplasty under general anesthesia. Each subject was to serve as her own control.