Kitab al-Tasrif is a comprehensive medical encyclopedia written by the renowned Islamic physician Ibn al-Nafis in the 13th century. It covers various medical topics, including anatomy, surgery, and pharmacology, and serves as a significant contribution to the field of medicine during the Islamic Golden Age. The book is notable for its systematic approach to medical knowledge and its emphasis on empirical observation. Kitab al-Tasrif influenced both Islamic and European medicine, laying the groundwork for future medical texts and practices, and showcasing the advancements in medical understanding during its time.