If this looks like something a dog might have left on the street, you’d actually be right. Album Graecum (‘Greek white’) was a special odourless dog or hyena dung, whitened through exposure to air, that was used in medicine and in the leather-making process. It was recommended as part of a gargle for throat complaints and can be found in medical texts from Roman times up until the 1700s.
Album Graecum was used in a gargle with other, more palatable, ingredients such as quince seeds in red rosewater, and syrup of raspberries and mulberries. It was recommended where enemas and bleeding had already failed.