He is known for having written in AD 447 a Latin treatise titled De Medicina[1] - although the exact date is transmitted only in a relatively late manuscript from the 13th century.
His work appears to draw heavily, both directly and indirectly, on Greek medical sources, as was common in the African school of medicine.
In each case, the name of the disease is first explained, then the cause, diagnosis and development are described and finally a treatment method is recommended.
[4] A Christian by faith, he may be the person mentioned in passing in the anonymous De miraculis Sancti Stephani, a work written between 418 and 427, where a certain Felix is referred as holding the high medical dignity of archiater, or chief doctor of his community.
[3] The name Cassius Felix is sometimes also applied[6] to Cassius Iatrosophista, an earlier Greek medical writer (2nd or 3rd century AD) known only as the author of 84 or 85 Quaestiones Medicae et Problemata Naturalia (Ancient Greek: Ἰατρικαὶ Ἀπορίαι καὶ Προβλήματα Φυσικά).