Antimonials are compounds that contain the element antimony, which is a metalloid found in nature. These compounds have been used historically in medicine and alchemy, often for their supposed healing properties. Antimonials can be found in various forms, including antimony trioxide and potassium antimonyl tartrate, and they have applications in industries such as glassmaking and flame retardants. In traditional medicine, antimonials were used as purgatives and to treat various ailments, but their use has declined due to potential toxicity. Today, they are primarily studied for their role in pharmaceuticals and their effectiveness against certain diseases, such as leishmaniasis.