Human existence since prehistoric times, has been linked most vegetable world, plant, who provided his food, fuel and medicines. Thus, it is no wonder that man, since the ancient period of its existence, appealed first to plant in order to alleviate his suffering. Ally human nature, gave in his garden, the first since the dawn of its existence cures, born thus phytotherapy. The purpose of this paper is to present herbal medicine as a science old, but very modern and broad categories of plants with sanogenetic effects, scientifically demonstrated. There will also be highlighted issues sanogenesis, sanogenetic factors, ecosanogenesis, etc. in relation to human medicine. This study is based on research conducted by the author of the doctoral internship and a rich documentation of numerous national and international sources.