Inclusion Criteria:  American Society of Anaesthesiologists (ASA) physical status I and II  Exclusion Criteria:  Hypersensitivity to amide local anaesthetics/lignocaine Liver disease (alanine aminotransferase, ALT or aspartate aminotransferase, AST more than twice normal) Renal impairment (defined as estimated Glomerular Filtration Rate <= 60ml/min) History of cardiac disease/cardiac arrhythmia Epilepsy Intellectual disability Preoperative chronic pain with regular opioid usage