Full catalogue record in Fihrist: Union Catalogue of Manuscripts from the Islamicate WorldThe Qānūn of Ibn Sīnā (Avicenna) represents the high point in the codification of Arabic medicine. It supplanted the works of Galen, al-Rāzī and al-Majūsī, and had an enormous influence on the teaching and practice of medicine. The Qānūn is divided into five books. Book I starts with a definition of medicine and then deals in a general fashion with the human body, sickness, health and therapeutics.