Melatonin vs Gabapentin for Post Trauma Surgery

Inclusion criteria: Patients will be recruited if they satisfy the following inclusion criteria: * Age 18-65 years, * ASA score I-II, * Scheduled either for non-emergency surgery after trauma and * Presumptive duration of operation not exceeding 3 hours. Exclusion criteria: The following patients will be excluded from the study: * Patients for emergency surgeries * Surgeries taking place after 1pm (to account for diurnal variation in cortisol levels) * Patients having altered mental state, history of psychiatric disorder, history of drug abuse or those on chronic pain medication * Patients who have come for a repeat surgery and have already been included once in the study