Drug therapy or pharmacotherapy is the branch of medicine, which studies the therapeutic use of pharmaceutical drugs. It is unlike any other therapy as it is based on the efficient, safe, economical and optimum use of drugs to treat ailments. This book explores all the important aspects of drug therapy in the present day scenario. It is a compilation of chapters that discuss the most vital concepts and emerging trends in this field. Students, researchers, experts and all associated with drug therapy will benefit alike from this book.