Dentists in clinical practice dread the thought of having a medical emergency in their operatory. Various individual surveys throughout the world, regard unconsciousness as the most common medical emergency that a dentist has already faced or likely to face in his tenure of practice. Skillful handling of an emergency on the Dental Chair, not only depends on Responding to the Emergency, But identifying the likelihood of an Emergency in the first place. To identify an Emergency the Practitioner should be thorough with the Pathophysiology of the precipitating attack, hence gaining an upper hand in the Prompt Recognition and Response to a Medical Emergency. This paper is a compilation of such details, which may help in better handling of Unconsciousness in the dental office.