Potassium bromide
Potassium bromide (KBr) is a white crystalline substance with a bitter salty taste that was used in medicine as a sedative. 

In 2370, potassium bromide was part of a "herbal beverage" that Quark attempted to drug Doctor Julian Bashir with, in an attempt to fix a racquetball match between Bashir and Miles O'Brien. ()

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Chemical compounds