This book presents 848 compounds isolated and identified from plants that present anti-inflammatory and antiplatelet aggregation activities. These substances have been classified by chemical groups and each provides the most relevant information of its pharmacological activity, action mechanism, chemical structure, spectroscopic date, and other properties. Chemical structures have been drawn to indicate the stereochemistry. In this handbook the summary of the scientific information of plants that present biological activity and the compounds responsible for these activities is presented, which introduces the reader to the study of medicinal plants and also provides bibliographic references, where a detailed study of its chemistry and pharmacology can be found.