A Study to Evaluate Safety, PK, Efficacy of TLC590 for Postsurgical Pain Management Following Bunionectomy

This is a Phase 2, randomized, double-blind, 2-part comparator- and placebo-controlled study to evaluate the safety, PK, and efficacy of TLC590 via a single infiltrative local administration in adult subjects following bunionectomy. The primary objective of this study is to evaluate the analgesic efficacy of TLC590 for post-surgical pain management in subjects following bunionectomy. The secondary objectives of this study are: * To evaluate the pharmacokinetic (PK) profile and dose-exposure relationship of TLC590, as well as the bioavailability as compared with Naropin®. * To evaluate the safety and tolerability of TLC590 for post-surgical pain management in subjects following bunionectomy. * To evaluate the exposure-response relationship between PK parameters and pain intensity. The study will be divided into two parts: Part 1: Blinded Pharmacokinetics of TLC590 and Naropin®. Approximately 48 subjects will be randomized to treatments. Part 2: Efficacy and Safety of TLC590 versus bupivacaine and Placebo. Part 2 of the study will randomize approximately 150 evaluable subjects who meet all entry criteria.