Erector Spinae Plane Block with Dexmedetomidine and Bupivacain Versus Dexamethasone and Bupivacain for Postoperative Analgesia in Patients Undergoing Abdominal Surgeries

Inclusion Criteria: Age :18 years old and older. Patients undergoing open abdominal surgery. Exclusion Criteria: 1. Patient refusal 2. known sensitivity or contraindication to any of study drugs 3. contraindications for local anesthesia 4. Patients with local infection at site of puncture 5. uncooperative patients 6. history of psychological disorders or chronic pain and significant liver or renal disease.