Theodorus Priscianus (Greek: Θεόδωρος ὁ Πρισκιανός) was a physician at Constantinople during the fourth century, and the author of the Latin work Rerum Medicarum in four books.
[1][2] The Rerum Medicarum Libri Quatuor, or "Medical Matters in Four Books", is sometimes attributed to a person named Octavius Horatianus.
The author, in his preface, speaks against the learned and worthy disputes physicians held at the bedside of the patient, and against their reliance on foreign remedies in preference to indigenous ones.
Priscianus is generally identified as the author of a short Latin work, entitled Diaeta sive de Rebus Salutaribus Liber, first published in 1533. fol.
[2] Of the Rerum Medicarum, Dr. William A. Greenhill writes, "Several of the medicines which Priscianus mentions are absurd and superstitious; the style and language of the work are bad; and altogether it is of little interest and value.