Potassium bromide (K Br) is a salt, widely used as an anticonvulsant and a sedative in the late 19th and early 20th centuries, with over-the-counter use extending to 1975 in the US. Its action is due to the bromide ion (sodium bromide is equally effective).

Application

Potassium bromide is a halide salt most commonly used as an add-on anticonvulsant drug to phenobarbital when the latter is ineffective or not as effective as desired. It also may permit you to decrease the dose level of the phenobarbital. Potassium bromide may also be used initially as the sole anticonvulsant drug.