Efficacy and Safety of TRD205 Tablets for Postoperative Analgesia in Unilateral Total Hip Arthroplasty (Phase IIb)

Inclusion Criteria: * Able to provide written informed consent * Age 18 to 80 years, inclusive * BMI 18-32 kg/m² * ASA physical status I-II * Scheduled for elective unilateral total hip arthroplasty under general anesthesia * Able to understand study procedures and pain rating scales Exclusion Criteria: * Hypersensitivity to TRD205, celecoxib, or study-related medications * Use of prohibited analgesics, sedatives, CYP3A4 inhibitors/inducers, or analgesic herbs within specified washout periods * Inability to take oral medications postoperatively * Ipsilateral hip surgery within 1 year; contralateral hip surgery within 1 month * Hip revision surgery, developmental dysplasia Crowe type IV, or tumor involving hip * Clinically significant hemodynamic instability or cardiac arrhythmia * Severe hepatic, renal, cardiovascular, or metabolic disease * History of NSAID-induced asthma, active peptic ulcer disease * Drug or alcohol abuse within 1 year * Pregnancy, breastfeeding, or lack of effective contraception * Participation in another interventional clinical trial within 3 months