This book has been written in detail with special reference to initial assessment of the patient, proper antidotes, the role of preventive measures especially poisoning patients; and also tables and algorithms as and wherever necessary, have been given. A chapter on 'Guidelines for management and treatment of poisoning' has been added. This book will be a ready-reckoner for the easy and early diagnosis and treatment of poisoning and drug overdose in the emergency room.This book Diagnosis and Treatment of Poisoning and Drug Overdose was long-awaited by medical students, postgraduate, general practitioners, casualty medical officers and ICCU doctors. This book has been prepared to keep in mind the necessity for guiding junior doctors and doctors in CCU to give first-aid, investigate and give proper antidote for a drug overdose. Detailed descriptions have been given with charts and figures for diagnosis and treatment of poisoning and drug overdose. This book will be definitely useful in the armamentarium of emergency medical care. The book would be will be useful for students, postgraduates, a general practitioner.