Potassium bromide is a chemical compound consisting of potassium and bromine (KBr). It is a solid salt, crystalline, white, hygroscopic, soluble in water and in ethanol. Because of their ionic nature, its aqueous solution is an electrical conductor. In dilute aqueous solutions it has sweet taste, at higher concentrations it tastes bitter, and when more concentrated, it has a salty taste for humans (these effects are mainly due to potassium ion; sodium bromide has salty taste in all concentrations). It was widely used as an anticonvulsant and sedative in the nineteenth and twentieth centuries. This action is due to the bromide ion (sodium bromide is equally effective). The potassium bromide is currently used as a veterinary drug, as an antiepileptic drug for dogs and cats.