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 keeping in mind the necessity for guiding junior doctors and doctors in CCU to give first-aid, investigate and give proper antidote for drug overdose. Detailed descriptions have been given with charts and figures for diagnosis and treatment of poisoning and drug overdose. Specific antidotes have also been mentioned. A chapter on ‘Envenomation by Snakes’ has also been given. Initial assessment of the patients and appropriate antidote in saving patients, who have been brought to the emergency with history of consuming poison or drug for suicidal purpose or accidentally, have been discussed, one chapter has been added for diagnosis and treatment of poisoning and drug overdose by pregnant women. This book will be definitely useful in the armamentarium of emergency medical care.