According to Wikipedia “Bromide compounds, especially potassium bromide, were frequently

According to Wikipedia “Bromide compounds, especially potassium bromide, were frequently used as sedatives in the 19th and early 20th century. Their use in over-the-counter sedatives and headache remedies (such as Bromo-Seltzer) in the United States extended to 1975, when bromides were withdrawn as ingredients, due to chronic toxicity.”

FromMcClure’s Magazine, 1915.