Inclusion Criteria:  Patients 19 years of age or older who are expected to undergo unilateral hip arthroplasty ASA PS 1-3  Exclusion Criteria:  Revision total hip arthroplasty Allergy to drugs used in the study Patients with moderate or more hepatic impairment (AST/ALT is more than 2.5 times the upper limit of normal) Estimated glomerular filtration rate < 30 mL/min/1.73m2 Opioid dependence Prolongation of PT and aPTT more than twice the upper limit of normal Pre-existing neurological or anatomical disorders of the lower extremities Serious psychiatric disorders