Intraperitoneal levobupivacaine and dexamethasone for post-operative pain after laparoscopic cholecystectomy

INTERVENTION: Randomised Controlled Trial. 3 groups: 1. Control group will not receive intraperitoneal local anaesthetic or dexamethasone as is our usual practice 2. L group will receive 15 ml of 0,5% levobupivacaine after establishing pneumoperitoneum and again at the end of the procedure 3. LD group as group L plus dexamethasone CONDITION: Signs and Symptoms: Post operative pain ; Signs and Symptoms ; Pain, not elsewhere classified PRIMARY OUTCOME: Pain Scores SECONDARY OUTCOME: Not provided at time of registration INCLUSION CRITERIA: Patients undergoing Laparoscopic Cholecystectomy