A Manual of Pharmacodynamics, written by Richard Hughes in 1868, is a comprehensive guide to the study of drug effects on the human body. The book provides a detailed explanation of the principles of pharmacodynamics, including the effects of different drugs on the body, their mode of action, and the factors that influence their efficacy. It covers a wide range of topics, including the classification of drugs, their action on the various organs and systems of the body, and the methods used to study their effects. The book also includes a section on the history of pharmacodynamics, tracing the development of the field from ancient times to the present day. With its detailed explanations and comprehensive coverage, A Manual of Pharmacodynamics is an essential resource for students and professionals in the field of pharmacology.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.