Medical emergencies in dentistry are any unfavourable medical occurrences that may occur during dental treatment. For each of those incidents to be effectively and safely managed, a proper diagnosis is necessary. In many emergency cases, only basic life support is needed; in others, specific pharmacological therapy may be added. Priorities for preventing medical emergencies in dentistry include recognition, prevention, planning, basic life support, cardiopulmonary resuscitation, and particular medical emergencies. This review gives the idea of common medical emergencies, which may occur in dental office and their management protocol.