BACKGROUND- We want to compare the effectiveness of caudal bupivacaine and caudal bupivacaine with rectal paracetamol suppository in paediatric patients undergoing subumbilical surgeries. METHODS-It was a prospective randomized study done for for those pediatric patients undergoing sub umbilical surgeries, aged from 3 to 8 years weighing less than 20 Kg of either gender, ASA-1, in Department of Anaesthesiology, SVMC & SVRRGH, Tirupati,1year duration from the time of scientific and IEC approval RESULTS- In both the caudal bupivacaine with rectal paracetamol group and the caudal bupivacaine group, the distribution of all cases in each weight group is comparable, and in all weight groups, there is a significant increase in rescue analgesic time in the caudal bupivacaine with rectal paracetamol group. The time needed to administer Rescue analgesic is increased by 4 hours 41 minutes in the 10-12 kg Group C patient, by 4 hours 51 minutes in the 13-15 kg Group C patient, by 4 hours 44 minutes in the 16-18 kg Group C patient, and by 4 hours 48 minutes in the 19-20 kg Group C patient. The time needed to administer Rescue analgesic is increased by 5 hours 54 minutes in the 10-12 kg Group C, by 5 hours 23 minutes in the 13-15 kg Group C, by 5 hours 31 minutes in the 16-18 kg Group S, and by 6 hours 03 minutes in the 19-20 kb Group S. When comparing the study group and the control group in terms of the mean R.A. Time, there is a highly significant difference between the two groups (t = 3.435, p 0.0001). Heart rates in Group S and Group C difference is significant. Because Group S has a significantly lower heart rate than Group C at all post operative time intervals, this indicates that Group S received a higher level of post operative analgesia. The pain score is considerably lower in the study group S (caudal bupivacaine with rectal paracetamol) than it is in the control group C [caudal bupivacaine alone] at all post operative intervals. When compared with Group S, the incidence of post-operative nausea and vomiting, as well as an increase in temperature, is significantly higher in Group C. The first postoperative urine voiding time in the study group is 5.410.51 hours, while the time in the control group is 4.380.34 hours. This difference is statistically significant (t = 3.434, p 0.05).