Materia medica

Materia medica (English: medical material/substance) is a Latin term from the history of pharmacy for the body of collected knowledge about the therapeutic properties of any substance used for healing (i.e., medicines). The term derives from the title of a work by the Ancient Greek physician Pedanius Dioscorides in the 1st century AD, De materia medica, 'On medical material' (Περὶ ὕλης ἰατρικῆς, Peri hylēs iatrikēs, in Greek). The term materia medica was used from the period of the Roman Empire until the 20th century, but has now been generally replaced in medical education contexts by the term pharmacology. The term survives in the title of the British Medical Journal's 'Materia Non Medica' column. Materia medica (English: medical material/substance) is a Latin term from the history of pharmacy for the body of collected knowledge about the therapeutic properties of any substance used for healing (i.e., medicines). The term derives from the title of a work by the Ancient Greek physician Pedanius Dioscorides in the 1st century AD, De materia medica, 'On medical material' (Περὶ ὕλης ἰατρικῆς, Peri hylēs iatrikēs, in Greek). The term materia medica was used from the period of the Roman Empire until the 20th century, but has now been generally replaced in medical education contexts by the term pharmacology. The term survives in the title of the British Medical Journal's 'Materia Non Medica' column. The earliest known writing about medicine was a 110-page Egyptian papyrus. It was supposedly written by the god Thoth in about 16 BC. The Ebers papyrus is an ancient recipe book dated to approximately 1552 BC. It contains a mixture of magic and medicine with invocations to banish disease and a catalogue of useful plants, minerals, magic amulets and spells. The most famous Egyptian physician was Imhotep, who lived in Memphis around 2500 B.C. Imhotep’s materia medica consisted of procedures for treating head and torso injuries, tending of wounds, and prevention and curing of infections, as well as advanced principles of hygiene. In India, the Ayurveda is traditional medicine that emphasizes plant-based treatments, hygiene, and balance in the body’s state of being. Indian materia medica included knowledge of plants, where they grow in all season, methods for storage and shelf life of harvested materials. It also included directions for making juice from vegetables, dried powders from herb, cold infusions and extracts. The earliest Chinese manual of materia medica, the Shennong Bencao Jing (Shennong Emperor's Classic of Materia Medica), was compiled in the 1st century AD during the Han dynasty, attributed to the mythical Shennong. It lists some 365 medicines, of which 252 are herbs. Earlier literature included lists of prescriptions for specific ailments, exemplified by the Recipes for Fifty-Two Ailments found in the Mawangdui tomb, which was sealed in 168 BC. Succeeding generations augmented the Shennong Bencao Jing, as in the Yaoxing Lun (Treatise on the Nature of Medicinal Herbs), a 7th-century Tang Dynasty treatise on herbal medicine. In Greece, Hippocrates (born 460 BC) was a philosopher later known as the Father of Medicine. He founded a school of medicine that focused on treating the causes of disease rather than its symptoms. Disease was dictated by natural laws and therefore could be treated through close observation of symptoms. His treatises, Aphorisms and Prognostics, discuss 265 drugs, the importance of diet and external treatments for diseases. Theophrastus (390–280 BC) was a disciple of Aristotle and a philosopher of natural history, considered by historians as the Father of Botany. He wrote a treatise entitled Historia Plantarium about 300 B.C. It was the first attempt to organize and classify plants, plant lore, and botanical morphology in Greece. It provided physicians with a rough taxonomy of plants and details of medicinal herbs and herbal concoctions. Galen was a philosopher, physician, pharmacist and prolific medical writer. He compiled an extensive record of the medical knowledge of his day and added his own observations. He wrote on the structure of organs, but not their uses; the pulse and its association with respiration; the arteries and the movement of blood; and the uses of theriacs. 'In treatises such as On Theriac to Piso, On Theriac to Pamphilius, and On Antidotes, Galen identified theriac as a sixty-four-ingredient compound, able to cure any ill known'. His work was rediscovered in the 15th century and became the authority on medicine and healing for the next two centuries. His medicine was based on the regulation of the four humors (blood, phlegm, black bile, and yellow bile) and their properties (wet, dry, hot, and cold). The Greek physician Pedanius Dioscorides, of Anazarbus in Asia Minor, wrote a five-volume treatise concerning medical matters, entitled Περὶ ὕλης ἰατρικῆς in Greek or De Materia Medica in Latin. This famous commentary covered about 600 plants along with therapeutically useful animal and mineral products. It documented the effects of drugs made from these substances on patients. De Materia Medica was the first extensive pharmacopeia, including about a thousand natural product drugs (mostly plant-based), 4,740 medicinal usages for drugs, and 360 medical properties (such as antiseptic, anti-inflammatory, stimulant). The book was heavily translated, and portrayed some of the emblematic actions of physicians and herbalists. One such page is Physician Preparing an Elixir. Dioscorides' plant descriptions use an elementary classification, though he cannot be said to have used botanical taxonomy. Book one describes the uses for aromatic oils, salves and ointments, trees and shrubs, and fleshy fruits, even if not aromatic. Book two included uses for animals, parts of animals, animal products, cereals, leguminous, malvaceous, cruciferous, and other garden herbs. Book three detailed the properties of roots, juices, herbs and seeds used for food or medicine. Book four continued to describe the uses for roots and herbs, specifically narcotic and poisonous medicinal plants. Book five dealt with the medicinal uses for wine and metallic ores. It is a precursor to all modern pharmacopeias, and is considered one of the most influential herbal books in history. It remained in use until about 1600 AD.