Inclusion Criteria:  Age 18 - 60 years, of both sexes. ASA class I - III. Scheduled to undergo laparoscopic cholecystectomy under general anesthesia. Body mass index (BMI) ≤ 30 kg/m².  Exclusion Criteria:  Age < 18 or > 60 years. ASA IV patients. Body mass index (BMI) > 30 kg/m². Intraoperative conversion to open surgery. Contraindications of regional anesthesia, e.g., allergy to local anesthetics, coagulopathy or infection at the site of injection. Uncooperative patients or psychiatric disorders. Spinal deformity or previous spine surgery. Chronic use of analgesics or drug dependence.