Timeline Entry

Al-Razi's Clinical Medicine

Around 900 CE, the Persian physician Abu Bakr Muhammad ibn Zakariyya al-Razi worked within the learned Arabic medical culture of Rayy and Abbasid Baghdad. Across writings produced during a career that extended into the early tenth century, he set inherited authorities beside named remedies, observations, and the changing course of individual cases.

Al-Razi did not invent clinical observation or replace books with a modern experimental method. His historical importance lies in an unusually large surviving record of how one physician made reading, hospital experience, patient questioning, regimen, and therapeutic comparison answer to one another (Richter-Bernburg; Álvarez Millán).

Historical Significance

Cases became evidence within learned medicine

Arabic-speaking physicians before al-Razi already inherited case writing, pharmacology, prognosis, and therapeutic reasoning from several traditions. His distinction is evidential rather than absolute: working papers, a pupil-compiled casebook, and separate treatises preserve the movement between textual learning and practice in exceptional detail (Richter-Bernburg, “Ḥāwi”; Álvarez Millán).

Reading and observation stayed together

The material later called al-Ḥāwī fī al-ṭibb places extracts from Greek, Syriac, Sanskrit, and Arabic medical writing beside al-Razi's agreements, objections, and observations. It was a working archive, not a declaration that experience had made earlier scholarship obsolete (Richter-Bernburg, “Ḥāwi”).

Case records preserved decisions over time

Kitāb al-Tajārib, the Book of Experiences, records cases treated by al-Razi or under his supervision. Questions, changing symptoms, prescriptions, diets, and sometimes outcomes make clinical judgement visible, although the collection was organised by pupils rather than published by al-Razi himself (Álvarez Millán).

Uncertainty could be compared

In Doubts about Galen, al-Razi invoked observations from hospitals in Iraq and Rayy and compared groups whose illnesses did or did not follow Galen's account. Such comparisons were embedded in humoral medicine and do not amount to a modern clinical trial, but they show that disagreement could be counted and argued from (Pormann; Adamson).

Career and Chronology

“c. 900” marks a period, not a single breakthrough

Al-Razi's exact career sequence is difficult to reconstruct. Later biographers connect him with hospitals in Rayy and Baghdad, while his own writings refer to encounters in hospitals in Iraq and at his home in Rayy. The dates of most medical treatises are not securely established. The conventional birth and death dates, 865 and 925, follow al-Biruni's later chronology rather than contemporary civic records (Richter-Bernburg; Adamson).

  1. 865 (251 AH): the date given by al-Biruni for al-Razi's birth at Rayy, a major city near present-day Tehran.
  2. Late ninth century: he studies and practises medicine in Rayy and Baghdad. Later biographies report hospital leadership in both cities, but do not provide a secure appointment chronology.
  3. Before 914: al-Razi dedicates the ten-part Kitāb al-Manṣūrī fī al-ṭibb to Abu Salih al-Mansur, governor of Rayy, who died in 914 (Adamson).
  4. Late ninth–early tenth century: the case material in Kitāb al-Tajārib, the notes later assembled as al-Ḥāwī, the treatise on smallpox and measles, and Doubts about Galen take shape; their internal order and precise dates remain uncertain.
  5. 925 (313 AH): al-Biruni's date for al-Razi's death at Rayy; other medieval reports supplied different years, so 925 is conventional rather than beyond dispute (Ibn Abi Usaybi'a).
  6. After al-Razi's death: a later account says that the Buyid vizier Ibn al-Amid obtained al-Razi's papers from his sister and had former pupils arrange them as al-Ḥāwī. This is a history of collective compilation, not simple authorial publication (NLM).
  7. 1094: an unnamed scribe completes the oldest dated surviving portion of al-Ḥāwī, now NLM MS A 17; it contains only the section on gastrointestinal conditions, not the entire work (NLM).
  8. 1279: Faraj ben Salim translates al-Ḥāwī into Latin as the Continens for Charles of Anjou, beginning another stage in al-Razi's textual reputation (NLM).

Cases, Patients, and Treatments

The records show practice, but not an unmediated bedside

Tajārib means experiences or trials. In the casebook, a patient's complaint could prompt questions about taste, sleep, pain, urine, or other signs before al-Razi recommended a diet, compound medicine, bloodletting, or another intervention. A study comparing its eye cases with his formal medical works found that practice did not simply enact the more elaborate theory described in textbooks. The casebook is therefore evidence for variation and practical choice, not proof that every recommendation was effective (Álvarez Millán; Álvarez Millán).

These treatments belonged to a humoral understanding of bodies. Health depended on the balance and movement of bodily qualities and fluids; food, sleep, activity, evacuation, and drugs could all alter a patient's condition. Terms translated as “melancholy,” “dropsy,” or “brain fever” are historical categories, not diagnoses that can be mapped automatically onto present-day psychiatry, oedema, or infection (Adamson; Pormann).

Some records include women, children, poor patients, and consultations at home as well as in hospitals. One case describes a woman whose confused speech and laughter were interpreted as humoral “melancholy”; no outcome was recorded. Such entries widen the social field beyond rulers and male scholars, yet patients' own explanations survive only through a physician or pupil, and women practitioners remain especially difficult to recover (Pormann).

Three Different Textual Records

Casebook, working archive, and disease treatise should not be collapsed

Kitāb al-Tajārib

This pupil-compiled collection is organised roughly from head to foot and records teaching encounters and therapeutic choices. Its closeness to practice makes it valuable, but selection, note-taking, and later compilation still shaped what survives (Álvarez Millán).

al-Ḥāwī fī al-ṭibb

Often translated as the Comprehensive Book on Medicine, it is better understood as posthumously arranged working files: excerpts, therapeutic notes, pharmacology, and observations under disease headings. Calling the whole work “case notes” understates how much of it records al-Razi's reading (Richter-Bernburg, “Ḥāwi”; NLM).

Kitāb fī al-jadarī wa-l-ḥaṣbah

The treatise on smallpox and measles compares the onset and course of two eruptive illnesses and became a durable part of al-Razi's reputation. It explains them through the condition of blood and bodily qualities, not viruses. Its value is a sustained, influential comparison—not a claim that communities had never recognised these illnesses before (Thèves, Crubézy, and Biagini; Wellcome Collection).

Authority and Criticism

Questioning Galen was a Galenic practice as well as a challenge

Galen of Pergamum remained al-Razi's most important medical authority. Doubts about Galen criticises particular arguments about disease, vision, the body, and philosophy; it does not discard the learned framework in which those questions made sense. Al-Razi continued to use humours, bodily powers, and other Galenic concepts even when observation led him to reject a specific description (Adamson).

The contrast between “rational tradition” and “empirical modernity” is therefore misleading. Galen had himself modelled criticism of predecessors, Arabic translators had compared variant texts, and al-Razi's own practice depended on books for categories and questions. What changed was not the arrival of observation, but the scale on which disagreements among text, remembered experience, and recorded cases became visible (Richter-Bernburg; Adamson).

Evidence and Later Reputation

A famous hospital story fails its own chronology

The thirteenth-century biographer Ibn Abi Usaybi'a preserves accounts of al-Razi's students, patients, generosity, and hospital work. He also repeats the story that al-Razi selected the site of Baghdad's Adudi hospital by hanging meat around the city and choosing the place where it decayed most slowly. The same biography already recognised a chronological problem: the hospital associated with Adud al-Dawla was rebuilt in 981–82, more than half a century after al-Razi's conventional death date (Ibn Abi Usaybi'a).

The legend should not be used as proof of an early controlled experiment or of the founding of a particular hospital. Al-Razi's own references to hospital observations support a connection with institutional practice in Iraq and Rayy; later biographies support a broader reputation for hospital leadership. They do not establish the exact buildings, dates, or offices with equal confidence (Pormann; Adamson).

Transmission further changed what readers encountered. Pupils organised papers, scribes copied incomplete volumes, and translators selected words for new audiences. The 1848 English Treatise on the Small-Pox and Measles available through Wellcome is a valuable public-domain route into the text, but it is a nineteenth-century translation with extensive editorial material, not al-Razi's Arabic manuscript or a transparent record of a tenth-century encounter (Wellcome Collection).

Explore Connected Pages

Place clinical criticism in its network

  1. Al-Razi

    Explore his career, writings, hospital reputation, and philosophical disputes.

  2. History of bedside medicine

    Follow case writing, patient examination, and clinical authority across different institutions and periods.

  3. The Canon of Medicine

    Compare al-Razi's working archive and case material with Ibn Sina's later medical system.

References

Sources and further reading

  1. Lutz Richter-Bernburg, “Abū Bakr Muhammad al-Rāzī's (Rhazes) Medical Works”

    Medicina nei Secoli 6, no. 2 (1994): 377–392. PMID: 11623416. A critical bio-bibliographical survey of the medical corpus and its combination of textual scholarship and observation.

  2. Cristina Álvarez Millán, “Practice versus Theory: Tenth-Century Case Histories from the Islamic Middle East”

    Social History of Medicine 13, no. 2 (2000): 293–306. DOI: 10.1093/shm/13.2.293. Compares eye treatments in al-Razi's formal writings with those recorded in the Kitāb al-Tajārib.

  3. Cristina Álvarez Millán, “The Case History in Medieval Islamic Medical Literature: Tajārib and Mujarrabāt as Source”

    Medical History 54 (2010): 195–214. DOI: 10.1017/S0025727300006712. Examines how clinical accounts were produced, circulated, and shaped by teaching and literary purpose.

  4. Peter E. Pormann, “Qualifying and Quantifying Medical Uncertainty in 10th-Century Baghdad: Abu Bakr al-Razi”

    Journal of the Royal Society of Medicine 106, no. 9 (2013): 370–372. DOI: 10.1177/0141076813496515. Discusses hospital records, patient groups, and al-Razi's use of numerical comparison.

  5. Peter E. Pormann, “Female Patients and Practitioners in Medieval Islam”

    The Lancet 373, no. 9675 (2009): 1598–1599. DOI: 10.1016/S0140-6736(09)60895-3. Uses a case attributed to al-Razi to examine both evidence for women patients and the wider silence about women's care.

  6. Lutz Richter-Bernburg, “Ḥāwi, al-”

    Encyclopaedia Iranica, vol. XII, fasc. 1, pp. 64–67 (published 2003; updated 2013). A source-critical account of the contents, posthumous compilation, manuscripts, and Latin translation of al-Ḥāwī.

  7. National Library of Medicine, “Kitāb al-Ḥāwī fī al-ṭibb (MS A 17)”

    Islamic Medical Manuscripts catalogue. Describes the posthumous compilation tradition and the NLM's incomplete manuscript, whose colophon is dated 30 November 1094.

  8. Ibn Abi Usaybi'a, “Abu Bakr Muhammad ibn Zakariyya al-Razi,” in A Literary History of Medicine

    Thirteenth-century biographical compilation, translated and annotated by Alasdair Watson and N. Peter Joosse, in Emilie Savage-Smith, Simon Swain, and Geert Jan van Gelder, eds. (Brill, 2019). DOI: 10.1163/9789004410312_051. A rich but much later primary source whose anecdotes and conflicting dates require critical use.

  9. Peter Adamson, “Abu Bakr al-Razi”

    Stanford Encyclopedia of Philosophy (2021; substantive revision 2025). A scholarly synthesis of the life, medical works, Galenic framework, Doubts about Galen, and evidential limits of later reports.

  10. Al-Razi, A Treatise on the Small-Pox and Measles, translated by William Alexander Greenhill

    London, 1848. Digitised by the Medical Heritage Library and catalogued by Wellcome Collection. A public-domain historical translation whose nineteenth-century terminology and editorial apparatus must be distinguished from the Arabic text.

  11. Catherine Thèves, Eric Crubézy, and Philippe Biagini, “History of Smallpox and Its Spread in Human Populations”

    Microbiology Spectrum 4, no. 4 (2016). DOI: 10.1128/microbiolspec.PoH-0004-2014. Reviews earlier, often uncertain evidence for smallpox and places al-Razi's especially clear description within a longer disease history.