Medicinal plant: Can be defined as any plant that when administered in a certain form and route to man or animals exerts some type of pharmacological action on them.Herbal drug or phytopharmaceutical: Are defined as finished and labeled medicinal products whose active ingredients consist of aerial or subway parts of plants or other plant material or combinations thereof, in their raw state in the form of herbal preparations. By plant material are understood juices, resins, fatty oils, essential oils and any other substance of a vegetable nature.PHARMACEUTICAL FORMS OF HERBAL MEDICINES MOST USED.- Fluid extracts: They are hydroalcoholic preparations of vegetable drugs where each ml. of the extract is equivalent to 1 gram of the dry drug. They are highly concentrated extracts of the active principles of plants.- Tinctures: They are alcoholic or hydroalcoholic solutions prepared with vegetable drugs or comparatively low concentrations.- Mouthwashes: Medicinal liquids to make mouthwashes for rinsing the oral mucosa.-