摘要: Melatonin is a neurohormone secreted by the pineal gland. It widely present in both plant and animal sources. In several countries, it sold over counter as tablets food supplement or additive. Currently, most often used to prevent jet lag induce sleep. has been being clinical trials with different therapeutic approaches. sedative, analgesic, anti-inflammatory, anti-oxidative chronobiotic effects. review, potential benefits of melatonin anaesthesia critical care are presented. This article aims review physiological properties how these could prove useful for applications perioperative management, pain medicine. The topic was handsearched from textbooks journals electronically PubMed, Google scholar using text words.