We discovered that the sections on kidney and bladder diseases in Emir çelebi's Anmūdhaj al-Ṭibb are actually Turkish translations of relevant sections of Ibn al-Nafīs's al-Mūjaz fī al-Ṭibb. In some of these chapters, Emir çelebi has added his own observations and experiences, whereas, in others, he has included quotations from physicians such as Ibn Māsawayh and Abū Bakr Muḥammad ibn Zakariyyā al-Rāzī. One of the most intriguing findings was the drug Yad-Allāh, which Emir çelebi claimed was very effective in reducing the kidney stone of the Grand Admiral of the Ottoman Navy Receb Pasha. According to Emir çelebi, Galen and Aflīnūs [?] both praised this medicine in their own works. However, it has been discovered that Yad-Allāh, as described in the literature, is a drug defined by Philagrius.