To evaluate and compare the effects of different doses of dexamethasone added to bupivacaine on postoperative analgesia provided by the Transverse Abdominis Plane (TAP) block in patients undergoing lower abdominal surgeries.

This study is a prospective , randomised double blind study which will be conducted to assess and evaluate the efficacy of dexamethasone 4 mg and 8 mg  as adjuvant with bupivacaine in TAP block in 90  ASA I -II patients undergoing elective lower abdominal surgeries . The primary outcome will be the efficacy on postoperative analgesia over first 24 hrs post surgery . The secondary outcome measured will be to determine postoperative opioid consumption in 24 hrs and the adverse effect associated with dexamethasone use.