Fifty two adultspatients with ASA physical status 1 and 2 are randomly allocated to receive a single injection of either epidural fentanyl 100 microgramor combination of fentanyl 100microgram with neostigmine 250, 500 and 750microgramin a total volume of 10 ml. Pain scores were recorded after 0, 5, 10, 15, 20, 30 mins to determine the onset of analgesia. Patients' vital signs as well as side effects were monitored at regular intervals.