The medicine of the Prophet, al-Tibb al-Nabawi, was a system of medical therapeutics which flourished during the later classical Arabic period, that is from the thirteenth century onwards. It was so called because of its alleged derivation from the Hadith, the sayings and practice of the Prophet Muhammad. In that way, it represented a system of medicine different from that which was current throughout the Arabic/Islamic world of the early medieval period. This medicine had largely been derived from Greek theory and practice and was the accepted method for all teaching and treatment during the first centuries of Islam. Indeed, it continued to dominate medical practice in one form or another until the nineteenth century, and traces of it still survive to our own day.