The 109 patients will be randomly divided into three groups:

1.     Group B (n=36) will receive 400 mg of Ibuprofen intra-venously 15 minutes before induction

2.     Group D (n=36) will receive 1 gm of Paracetamol intra-venously 15 minutes before induction.

3.     Group P (n=36) will receive 400 mg of Ibuprofen intra-venously and 1 gm of Paracetamol intra-venously 15 minutes before induction.

Procedure on the day of surgery:

15 minutes before induction , the patients in group B will receive 400 mg of inj  ibuprofen intravenously, the  patients in group D will receive 1 gm of inj  paracetamol intravenously, the  patients in group P will receive 400 mg of inj  ibuprofen  and 1 gm of inj paracetamol intravenously.

The operating room will be prepared and anaesthesia machine will be checked. All emergency drugs and equipment will be placed and checked in the operation theatre preoperatively. Standard monitoring with the continuous electrocardiogram , heart rate , non-invasive blood pressure , oxygen saturation  will be done and will be started before induction of anaesthesia. An 18 gauge intravenous cannula will be inserted in large vein of dorsum of non-dominant hand and intravenous line and normal saline at 10 ml/kg will be started for preloading. The study drugs will be administered as a single dose, i.e. 15 minutes before spinal anaesthesia. Under strict asepsis, lumbar puncture will be performed at L3-L 4 or L4-L5 spinal interspace, in sitting position, through a standard midline approach using a 26-G Quincke spinal needle. Hyperbaric, bupivacaine 0.5% 15 mg will be injected intrathecally.

The haemodynamics like  heart rate , mean arterial pressure , oxygen saturation , will be recorded every 5 minutes during the intraoperative period. Thereafter, the parameters will be observed after every 15 minutes till 2 hours postoperatively and thereafter every 2 hours till 6 hours and then at 12^th hour and 24^th hour postoperatively in ward.

Pain will be assessed using Visual Analogue Scale. It is linear scale, consisting of 10 cm line anchored at one end by a label such as No pain and other end by Worst pain imaginable. Patient simply marks the line to indicate the pain intensity. Pain intensity will be checked when patient is planned to be shifted to postoperative area. It will be baseline pain intensity and patients will be followed up every 15 minutes for next 2 hours in post operative area. Then after every 2 hours till 6 hours and then at 12^th hour and finally at 24^th hour in wards. Patients with a VAS score of 3 or more will receive injection Diclofenac sodium 75-mg intramuscularly as rescue analgesia whenever it happens. The study will be over when rescue analgesic is administered or after postoperative 24 hours in the ward. The time from administration of spinal anaesthesia to time of rescue analgesia will be total analgesia duration.

The surgery will be conducted as per procedure and no analgesic will be administered intra-operatively. The patient will be shifted to postoperative room and will be monitored there for next 2 hours and then at 6^th hour, 12^th hour and 24^th hour in the ward for post operative pain.