This book has been continuously modified and revised as per the latest information. Apart from adding up-to-date information on new drugs and therapeutics, special care has been taken to highlight the duration of therapy, adverse reactions and toxicity which are important while prescribing medications to a patient. A brief overview and definition has been added for each disease entity along with the clinical signs, symptoms and laboratory diagnosis. Updated guidelines and recommendations for immunization and management of hypertension have been incorporated.