Efficacy of Pre-operative Oral Pregabalin in Ambulatory Inguinal Hernia Repair for Post Operative Pain

Inclusion Criteria: * Clinical diagnosis of inguinal hernia * Patient undergo operation under daycare basis * ASA I-II * Written consent Exclusion Criteria: * ASA \> II * Allergic reaction against gabapentin and/or pregabalin * History of recurrent hernia repair. * Patient who has taken analgesia prior to the surgery * Liver failure * Renal failure * Pregnancy