History of Pharmacology

Summary

Pharmacology (the study of how substances affect the body and how they can be used to treat disease) is among the oldest systematic enterprises in medicine. Egyptian physicians compiled hundreds of plant and mineral remedies as early as 1600 BCE. The Greek physician Dioscorides, writing around 60–78 CE, organized over a thousand substances into the most complete drug reference the ancient world produced, though his underlying organizational logic, which grouped drugs by shared physiological effects on the body, was not fully understood until the twentieth century. Galen then redirected the field by reducing all drug properties to four qualities tied to the four humors, a framework that dominated Islamic and European pharmacy for fifteen centuries. Chemical medicine (beginning with Paracelsus in the sixteenth century), the isolation of pure alkaloids in the nineteenth century, and Ehrlich’s targeted chemotherapy in 1910 each restructured what pharmacology was and what it aimed to do.

Before the Greeks: Empirical Accumulation

The pharmacological record begins long before Greece. The Egyptian Ebers Papyrus, dating to roughly 1600 BCE, contains 876 prescriptions formulated from more than five hundred substances. Among them: gentian, senna, castor oil, pomegranate as a vermifuge, squill, henbane, and raw liver given for night blindness. The liver prescription reflected an accurate clinical correlation that modern medicine later confirmed through Vitamin A research.(Ackerknecht, 1955) The papyrus is notable for what it omits as well as what it includes: neither diet nor venesection receives mention, suggesting a therapeutic culture built primarily around direct drug action rather than the regimen-first priorities that would later characterize Greek medicine.(Ackerknecht, 1955)

This accumulation of plant and mineral knowledge was by nature empirical: organized around what worked, remembered through repeated use, and transmitted through practice rather than theory. Across ancient cultures, the word for a remedial substance was frequently identical to the word for a poison. Greek pharmaka meant both simultaneously.(Riddle, 1985) That ambiguity was not a semantic accident; it reflected the genuine duality of active plant constituents, and every serious tradition of drug medicine since has had to manage the same duality.

Hippocratic Drug Practice: Diet First

The Hippocratic medical tradition that crystallized in Greece between 450 and 350 BCE approached drugs as the second rather than the first line of treatment. Hippocratic therapeutics placed diet as the primary tool, reaching for drugs only when dietary management failed, and surgery as a last resort.(Ackerknecht, 1955) This hierarchy followed from the Hippocratic conviction that the body possesses its own capacity to recover, and that the physician’s job is to support rather than override that process.

What counted as drug action within the Hippocratic framework was organized around experience of effect rather than any systematic theory of mechanism. The Hippocratic authors defined medicine’s project partly by exclusion: legitimate drug use was natural in causation, observable in effect, and independent of divine intervention or magical technique.(Nutton, 2023) Within that boundary, however, Hippocratic practice left drug selection largely to individual clinical judgment. The theoretical framework that would eventually connect drug properties to a comprehensive physiological system had not yet been built.

Dietetics achieved a kind of philosophical parity with surgery and pharmacology among the fourth-century physicians who followed in the Hippocratic tradition: some placed it above both on the grounds that dietary medicine prevents as well as cures.(Nutton, 2023) The Hippocratic emphasis on regimen and environment as the primary determinants of health had lasting consequences for how drug therapy was understood: not as an autonomous technical discipline, but as one element within a broader management of the body’s relationship to its conditions.

Dioscorides and the Organization of Drug Knowledge

The decisive moment in ancient pharmacology came with Pedanius Dioscorides, who wrote De materia medica (The Materials of Medicine) sometime around 60–78 CE.(Riddle, 1985) Dioscorides was born at Anazarbus in Roman Cilicia and dedicated his work to Areios of Tarsus, his teacher in pharmacology, in one of the earliest explicit acknowledgments of a pharmacological lineage.(Riddle, 1985) He was probably a traveling physician rather than a military doctor, as the sparse wound-therapy content of his five books suggests, and his wide travels gave him unusual access to both plant materials and the folk knowledge surrounding them.(Riddle, 1985)

The medical world Dioscorides inhabited was contested between four major sects: the Empiricists, who rejected theoretical anatomy and relied on observed effect; the Dogmatists, who appealed to theory and reason as the basis for therapy; and the Methodists and Asclepiadians, who tried to find middle ground between those two irreconcilable positions.(Riddle, 1985) Dioscorides positioned himself as a critical synthesizer within this contested field, combining personal observation gathered from wide travel with systematic research across prior authorities, producing a work that survived while the writings of his competitors were lost within a few centuries of composition.(Riddle, 1985)

Writing within the Roman imperial context that Scribonius Largus had earlier described as one where pharmacology was an inseparable component of any legitimate professio of medicine, Dioscorides treated his project as a contribution to that unified practice.(Nutton, 2023) Ackerknecht calls him “the father of our materia medica” and a superb pharmacognosist, a judgment that anticipates Riddle’s later detailed reconstruction of his methods.(Ackerknecht, 1955)

De materia medica catalogued over a thousand substances (roughly 700 plants, plus animal products and minerals) organized into five books.(Nutton, 2023) Book I covered aromatics, oils, salves, trees, and shrubs; Book II, animals, animal parts and products, cereals, and pot herbs; Books III and IV, roots, juices, herbs, and seeds; Book V, wines and minerals. This structure implicitly recognized the animal, vegetable, and mineral kingdoms as distinct pharmacological domains.(Riddle, 1985) Each individual chapter followed a standardized sequence: name and synonyms, habitat, botanical description, drug properties, medicinal usages, harmful side effects, dosages, harvesting and preparation, adulteration tests, veterinary uses, and occasionally magical applications.(Riddle, 1985) This systematic format was itself an advance: where earlier writers had compiled drug information inconsistently, Dioscorides gave each substance the same treatment.

Dioscorides documented drug properties as empirically derived categories placed before the list of specific medicinal usages in each chapter, using over twenty distinct Greek property terms across Book I alone, with “warming” (thermantikos) being the most frequently applied.(Riddle, 1985) Importantly, he did not subscribe to four-humor theory; where he used humoral language, it was in the older colloquial sense of “body juices” rather than as a theoretical system linking drug action to cosmological balance. His task was to present relief, not to build a systematic theoretical account of disease causation.(Riddle, 1985)

His method was explicitly comparative and empirical. He described his approach as researching usages among prior writers, comparing accounts to determine what was general knowledge, then confirming usages through direct inquiry with people about their own experiences.(Riddle, 1985) Where sources became implausible, he distanced himself: claims he could not rationally accept were prefaced with “It is reported that…,” a rhetorical signal distinguishing empirically grounded knowledge from tradition-reported possibility.(Riddle, 1985) He also explicitly rejected the Asclepiadean practitioners who, in his view, measured drug activities “only cursorily” and explained drug action through speculative atomic theories rather than experimental testing.(Riddle, 1985)

The pharmacological quality of Dioscorides’ work is repeatedly confirmed by modern chemistry. White willow leaves and bark (Salix alba), which he recommended as a warm poultice for gout, contain salicin in amounts sufficient to act as an analgesic, anti-inflammatory, and antipyretic; salicin is the precursor to salicylic acid, the base for aspirin.(Riddle, 1985) Dioscorides also recommended approximately forty-six abortifacients, explicitly distinguishing between remedies that prevent fertilization and those that abort an existing fetus, a clinical precision his contemporaries rarely matched.(Riddle, 1985) The plant lukion, which he used for tonsillitis and infected sores, belongs to either the Rhamnus or Berberis family; both contain berberine, a quaternary alkaloid with confirmed antimicrobial activity.(Riddle, 1985)

The Lost Organizational Logic

The most consequential element of Dioscorides’ work, and the most thoroughly misunderstood for two millennia, was his organizational system. He explicitly criticized his predecessors for using alphabetical arrangement, which, he said, “splits off genera and properties from what most resembles them” and “is almost impossible to memorize as a unit.”(Riddle, 1985) What he offered instead was, as he described it in his preface, a “new and superior” arrangement, but he did not explain what the new arrangement was.

John Riddle’s Dioscorides on Pharmacy and Medicine (1985) provides the most sustained reconstruction of what Dioscorides actually did. Riddle’s central argument is that Dioscorides organized drug chapters by the composite physiological effects of drugs on the body: not by botanical taxonomy, not alphabetically, but by the patterns of effect they produced in patients.(Riddle, 1985) He did not group plants according to a single principal action; each plant has a composite of physical effects, and Dioscorides identified the dominant cluster of shared effects to determine sequence.(Riddle, 1985) The opening sequence of Book I illustrates this concisely: iris (Ch. 1), yellow flag (Ch. 2), and spigne (Ch. 3) share warming, carminative, cathartic, and menstrual-regulating effects, even though they are not close botanical relatives. Spigne notably causes headaches rather than curing them, which is why it was placed here rather than among the analgesics.(Riddle, 1985) The proof is in the sequences themselves. Book IV, Chapters 68–75 group the tropane-alkaloid-bearing plants of the Solanaceae family (henbane, nightshade, Chinese lantern, bittersweet, jimsonweed, belladonna, mandrake) consecutively, not because Dioscorides had any concept of botanical family relationships, but because all produce similar physiological effects: sedation, mydriasis, and anticholinergic action.(Riddle, 1985) These chapters are preceded by the opium-bearing Papaveraceae (Chapters 63–67), which Riddle argues Dioscorides placed adjacent because papaverine, like the tropane alkaloids, functions as an antimuscarinic agent. Dioscorides had grouped drugs not only by their observable action but, unwittingly, by mechanism of action.(Riddle, 1985)

This organizational method was, as Riddle notes, closest to the chemical classification system that pharmacognosists in the twentieth century identified as the “preferred method of study,” but then considered impractical due to incomplete chemical knowledge.(Riddle, 1985) Dioscorides achieved through careful clinical observation what chemistry would only later be able to explain. The system also had a practical virtue: it permitted drug substitution. If a practitioner knew that two drugs shared the same physiological affinity group, they could substitute one for the other when necessary.(Riddle, 1985) Dioscorides himself demonstrated this explicitly in the case of cassia and cinnamon, noting that “twice as much cassia mixed in medicines will do the same things” as cinnamon.(Riddle, 1985)

Galen’s Reclassification and Its Consequences

Galen of Pergamon (129 – after 210 CE) praised De materia medica as “the most perfect of all treatises on materia medica” and made Dioscorides the principal pharmacological authority of the tradition he was building.(Riddle, 1985) The irony, as Riddle argues, is that Galen more than anyone else destroyed what Dioscorides considered his greatest contribution.

Galen’s pharmacological system reduced all drug properties to four primary qualities: warm, cold, wet, and dry. These four properties were linked to the four humors, allowing every drug to be described in terms of its positioning along those axes.(Riddle, 1985) He elaborated this into a degree system: each primary property could be present at four grades of intensity (weak, obvious, strong, massive), each subdivided into three levels, creating a twelve-degree scale for each quality.(Nutton, 2023) The degree scale provided a quantitative framework for dosing: a drug at first-degree cooling would register barely perceptible cooling action, while a drug at fourth-degree cooling would be life-threatening in that direction.(Riddle, 1985) The framework was theoretically coherent, internally consistent, and explicitly teachable.

Galen was no armchair theorist: he personally traveled the Mediterranean to acquire drug materials, interviewing shippers at Alexandria, bargaining with a camel driver for his load of medicaments, visiting the Dead Sea and Lycia in search of rare minerals, and traveling to Lemnos to buy 20,000 sealed portions of Lemnian earth directly after the blessing ceremony.(Nutton, 2023) That combination of theoretical rigor and personal engagement with raw materials made his pharmacological authority difficult to contest.

To demonstrate the system’s superiority, Galen corrected Dioscorides’ classification of coriander as cooling, arguing it was actually warming. That correction is revealing because of what happened afterward. Subsequent writers (Ibn Masawaih, Ibn Sina, Al-Kindi, Matthaeus Platearius) debated whether coriander’s primary quality was warming or cooling, not whether drugs with similar physiological effects should be grouped together.(Riddle, 1985) Galen had redirected attention from drug affinities and shared physiological usages to single-property identification and humoral reasoning. The question shifted from “what does this drug do to the body” to “what humoral quality does this drug possess.” Medieval Muslim physicians engaged with the Dioscoridean drug corpus almost entirely through this Galenic lens, and the original method of affinity grouping remained invisible to them.(Riddle, 1985)

One concrete consequence of Galen’s dominance was the perpetuation of his theory of “laudable pus,” the view that wounds normally produce pus in the process of healing. That single theoretical commitment became a tradition preventing aseptic wound treatment until the nineteenth century, when surgical practice finally broke with it.(Ackerknecht, 1955)

Galen’s four-quality system displaced Dioscorides’ empirical affinity method for a specific reason: it was embedded in a comprehensive cosmological account that proved compatible with both Christian and Islamic world views.(Riddle, 1985) Purely empirical pharmacological organization (grouping drugs by what they do) offered no theological or philosophical anchorage. A drug graded by its warmth at the second degree connected to a complete account of the natural order.

The final stage of displacement was physical rather than conceptual. Dioscorides’ original physiological arrangement was alphabetized by copyists at some point between Galen’s death and Oribasius’ compilation in the fourth century.(Riddle, 1985) Nutton confirms this trajectory: some copyists reverted to the familiar alphabetical practice within the larger book divisions, and this process helped make Dioscorides the dominant reference in medical botany for well over a thousand years, but entirely stripped of his original organizational principle.(Nutton, 2023) The Anicia Codex of 512 CE, the oldest surviving illustrated manuscript, presented the herbs in alphabetical order and substituted illustrations from Crateuas and other sources for whatever original pictures had accompanied Dioscorides’ text.(Riddle, 1985) What transmitted to medieval Islam and medieval Europe was a Dioscorides whose organizational logic had been stripped out and replaced with the alphabetical convention he had explicitly rejected.

The pharmacological culture Galen inherited and consolidated also included a growing interest in elaborate compound remedies. Andromachus the Elder, personal physician to Nero, replaced the Mithridatium with a new universal antidote called Galene, which expanded the ingredient count from forty-one to sixty-four, raised the proportion of opiates and minerals, and substituted viper flesh for the original lizard; he composed the recipe as a poem in eighty-seven couplets.(Nutton, 2023) These polypharmaceutical traditions ran alongside the single-drug focus that Dioscorides’ work embodied, and Galen’s theoretical framework proved equally capable of governing both.

Islamic Pharmacy: Transmission, Extension, and New Drugs

The translation of Greek medical texts into Arabic, organized primarily under Abbasid caliphal patronage from the eighth century onward, transmitted Galenic pharmacology to the Islamic world in a form that was then elaborated, tested, and extended. Hunayn ibn Ishaq (d. c. 873), the leading figure of the translation movement, translated some 129 Galenic works into Syriac and Arabic using a collation method that compared multiple Greek manuscripts to produce reliable texts, a philological standard superior to word-for-word translation methods.(Pormann, 2007) What arrived in Arabic was Galenism: the four-humour framework with its drug-quality corollaries, dressed in a Neoplatonic cosmology that proved as compatible with Islamic theology as it had been with Christian.(Pormann, 2007)

The most important contribution India made to this tradition was not theoretical but pharmacological: new drugs imported through trade routes.(Pormann, 2007) The Chinese pharmacopoeia offered similar material contributions; Ackerknecht notes that Western medicine eventually derived ephedrine, chaulmoogra oil, rhubarb, and camphor from Chinese sources, whatever the theoretical frameworks involved.(Ackerknecht, 1955)

Islamic physicians absorbed and applied Galenic drug-quality theory with considerable clinical sophistication. A prescription recorded by al-Razi for acute gout (two mithqals of colchicum, half a dirham of opium, three dirhams of sugar) demonstrates practitioners working with combinations that, in retrospect, had genuine pharmacological basis: colchicine, the active ingredient of colchicum, remains a standard treatment for acute gout attacks.(Pormann, 2007) The Islamic medical tradition also applied explicit quality grading to drug selection at the bedside, maintaining the Galenic framework as a guide while accumulating clinical experience that occasionally diverged from the theoretical predictions.

Early Modern Pharmacy: Herbals, Chemical Medicine, and the Persistence of Simples

In sixteenth- and seventeenth-century England, plant, animal, and mineral remedies were described as “the principal part of physick” and constituted practically the only type of medical information that lay men and women set down in writing.(Wear, 2000) The humoral theory organizing these remedies was not the exclusive property of university physicians; it was the common property of literate English culture.(Wear, 2000) Recipe books circulated at all social levels; women within households were expected to manufacture remedies as part of domestic production; and medical knowledge flowed in multiple directions across the ostensible boundary between learned and lay practice.(Wear, 2000)

The literate character of this medical culture was actively shaped by publishing: the vast majority of medical books published in England during the sixteenth and seventeenth centuries were written in English rather than Latin, creating a spectrum of medical reading that ran from simple remedy lists and herbals to theoretically sophisticated regimens and textbooks, all accessible to the educated non-specialist.(Wear, 2000) The result was a medical culture in which professional and domestic knowledge were not entirely separate domains.

Lay herbal knowledge occupied an ambivalent position within this culture. Both Galenic and Paracelsian learned medical traditions simultaneously incorporated and denigrated the knowledge of herb women and wise women: country people might be closest to plants, but medical writers consistently claimed superior understanding of how those plants worked, even as they drew on folk usages to fill their pharmacopoeias.(Wear, 2000)

Within this culture, simples (single-ingredient remedies taken directly from nature) occupied a philosophically privileged position. They were understood as God-given and primally pure, while compound drugs, assembled from multiple ingredients, were human inventions requiring justification.(Wear, 2000) Both Galenic physicians and their Paracelsian critics shared this starting assumption about simples even as they diverged sharply on how to understand and prepare them.(Wear, 2000)

Paracelsus (1493–1541) and his followers proposed a fundamentally different framework for pharmaceutical action. Where Galenism explained drug effects through the balance of four qualities, Paracelsianism proposed that active principles, the specific chemical essences within each substance, were responsible for both disease and cure. The physician’s task was to isolate the active essence, purify it from surrounding impurities, and deploy it against the specific disease it was designed to counter. Wear notes that Helmontianism, the more careful and experimentally rigorous tradition that developed from Paracelsianism in the seventeenth century, occupied the intellectual space between Paracelsianism and the emerging “new science” of Boyle and Newton.(Wear, 2000)

The practical impact of chemical medicine on the drug supply was registered most clearly not through doctrine but through therapeutics. The assimilation of folk remedies into the learned pharmacopoeia was, Ackerknecht notes, a specialty of Enlightenment physicians: William Withering introduced digitalis into orthodox medicine in 1775 after learning of foxglove’s use for dropsy from an old woman.(Ackerknecht, 1955) Jenner’s vaccination, Fowler’s arsenical solution, and similar introductions followed the same pattern: careful clinical testing of empirically discovered plant or mineral materials, detached from their original theoretical contexts.

Alkaloid Isolation and the Birth of Modern Pharmacology

The most decisive technical development in pharmacological history came in the early nineteenth century, when chemists learned to isolate pure active substances from crude plant materials. Sertürner isolated morphine from opium in 1806; Pelletier and Caventou isolated strychnine in 1818 and quinine in 1820.(Ackerknecht, 1955) These isolations transformed the situation. Where drug therapy had previously been conducted with complex plant preparations whose active constituents were unknown and whose doses were variable, it could now proceed with defined substances in reproducible quantities.

The experimental program that built on alkaloid isolation was centered in France. Magendie worked with strychnine, morphine, emetine, the bromides, and iodine; his pupil Claude Bernard analyzed opium, nicotine, ether, and curare.(Ackerknecht, 1955) What Magendie and Bernard established was the possibility of experimental pharmacology: testing defined substances under controlled conditions, tracking dose-response relationships, determining mechanisms of action rather than simply cataloguing effects. Ackerknecht dates the birth of modern pharmacology to this program.(Ackerknecht, 1955)

This development finally provided the conceptual tools Riddle’s analysis of Dioscorides retrospectively applied. When Riddle argues that Dioscorides grouped tropane-alkaloid-bearing plants by their shared physiological effects, or that the Papaveraceae were placed adjacent to the Solanaceae because both contain antimuscarinic agents, he is using nineteenth-century pharmacochemistry to decode a first-century organizational system.(Riddle, 1985) Dioscorides had arrived at the same groupings through cumulative clinical observation. That convergence across eighteen centuries is not coincidental; it reflects the fact that plants with similar active constituents produce similar clinical effects, and careful practitioners noticed the patterns.

Rational Chemotherapy: The Ehrlich Program

Paul Ehrlich’s development of salvarsan (compound 606) in 1910 opened a new phase in pharmacological thinking. After testing hundreds of chemical combinations, Ehrlich found in his 606th attempt an effective treatment for syphilis.(Ackerknecht, 1955) The approach was specifically targeted: a drug compounded to fight a disease of known cause through specific chemical affinity between the drug and the infectious organism. Ackerknecht calls salvarsan “the first rational chemotherapy” and “the fulfillment of the old ideal of drug treatment”: a specific chemical agent directed at a specific disease.(Ackerknecht, 1955)

Ehrlich’s conceptual contribution was the “magic bullet” — a drug that would seek out and destroy its target while sparing host tissue. Mukherjee’s The Emperor of All Maladies (2010) traces how this concept directly inspired the cancer chemotherapy program: if one could find a chemical that killed bacteria without killing the patient, then — in principle — the same logic might apply to cancer cells.(Mukherjee, 2010) The practical realization of this logic for cancer came from an unexpected source: the discovery during World War I that mustard gas caused severe bone marrow suppression. Alfred Gilman and Louis Goodman at Yale tested nitrogen mustard — a derivative — on a patient with advanced lymphosarcoma in 1942; the masses disappeared after the first treatment cycle, establishing alkylating agents as the second major class of cancer chemotherapy after Ehrlich’s targeted approach.(Mukherjee, 2010)

The antifolate line of chemotherapy emerged from a different observation. Sidney Farber at Children’s Hospital Boston, noting that folic acid appeared to accelerate leukemic cell growth, tested the antifolate aminopterin on children with acute leukemia in 1947. The first two patients showed temporary remissions — the first time leukemia had responded to any drug. Mukherjee calls this “the moment that inaugurated modern chemotherapy.”(Mukherjee, 2010) Gertrude Elion and George Hitchings at Burroughs Wellcome then synthesized 6-mercaptopurine (6-MP), extending remissions and establishing antimetabolites — drugs that block nucleotide synthesis — as a distinct pharmacological class, work for which Elion and Hitchings received the Nobel Prize in 1988.(Mukherjee, 2010)

A parallel track in modern pharmacology ran through nutritional chemistry rather than alkaloids or antibiotics. Christiaan Eijkman showed in 1897 that beriberi resulted from the absence of minute substances in polished rice; Frederick Hopkins developed the concept of “accessory foodstuffs” in 1906; Casimir Funk named them “vitamines” in 1912; and American groups at Wisconsin and Yale identified vitamins A and B by 1916.(Ackerknecht, 1955) The vitamin program expanded pharmacology’s scope from substances that act on disease processes to substances whose absence constitutes disease, a conceptual shift as significant as alkaloid isolation.

The bactericidal properties of molds had been observed since Pasteur, and experiments with Penicillium had been conducted as early as 1896, but were abandoned for lack of funding.(Ackerknecht, 1955) Fleming’s observation of penicillin in 1929 and Florey and Chain’s practical development in 1939 brought antibiotic therapy into clinical practice.(Ackerknecht, 1955) By mid-century, chemically synthesized drugs accounted for roughly half of all Western pharmaceutical production, with higher flowering plants providing another quarter.(Riddle, 1985)

The trajectory from the Ebers Papyrus to synthetic chemotherapy is not a simple ascent. It runs through loss as well as gain. Dioscorides’ organizational logic, the most pharmacologically sophisticated classification system of the ancient world, was dismantled by copyists and superseded by Galenic quality-theory within two centuries of composition.(Riddle, 1985) Riddle argues that had subsequent generations concentrated on drug affinities within each simple, associating drugs by their shared physiological effects, chemistry would have developed considerably faster — because identifying properties necessarily directs attention toward their causes.(Riddle, 1985) That is a counterfactual, but it accurately identifies the road not taken.

This zone is reserved for Thomas Easley’s annotations, corrections, and additions. The compiler does not modify this section.

See Also

• humoral-theory — The four-quality framework that displaced Dioscorides’ empirical classification
• galenic-medicine — The medical tradition built on Galenic pharmacological theory and its fifteen-century persistence
• pedanius-dioscorides — The first-century author whose De materia medica organized the ancient drug canon
• de-materia-medica — The text itself; its organizational logic, manuscript transmission, and reception
• vis-medicatrix-naturae — The healing power of nature, which shaped Hippocratic drug hierarchy
• empiricism-in-medicine — The methodological tradition Dioscorides worked within
• medical-pluralism — The diversity of drug traditions in early modern Europe

Sources

Evidence for this page is drawn from the following Library sources. Every claim cites an evidence card ID traceable to the source and chapter below.

• Riddle, John M. Dioscorides on Pharmacy and Medicine. University of Texas Press, 1985. (Authority: lead — principal source for Dioscorides sections)
• Nutton, Vivian. Ancient Medicine. 3rd ed. Routledge, 2023. (Authority: lead)
• Ackerknecht, Erwin H. A Short History of Medicine. Johns Hopkins UP, 1955. (Authority: lead)
• Pormann, Peter E. and Emilie Savage-Smith. Medieval Islamic Medicine. Edinburgh University Press, 2007. (Authority: lead)
• Wear, Andrew. Knowledge and Practice in English Medicine, 1550–1680. Cambridge UP, 2000. (Authority: lead)