Compare Intraperitoneal Instillation of Bupivacaine+dexmedetomidine Versus Bupivacaine+dexamethasone on Postoperative Pain After Lap Cholecystectomy

intra-peritoneal instillation of bupivacaine with dexamethasone (received 40 mL of 0.25% bupivacaine + 16 mg dexamethasone with 5 ml normal saline).

intra-peritoneal instillation of bupivacaine with dexmedetomidine (received 40 mL of 0.25% bupivacaine + dexmedetomidine 1 μg/kg with normal saline 5 ml).