Seidlitz powders

Seidlitz powders is the generic name under which a commonly known laxative and digestion regulator was marketed and sold by numerous manufacturers under names such as "Rexall Seidlitz Powders".

The three ingredients of Seidlitz powders (tartaric acid, potassium sodium tartrate and sodium bicarbonate) were manufactured by chemical factories from the mid-19th century onwards. The name 'Seidlitz powders' ultimately derives from the village of Sedlec in the Czech Republic. See also § Etymology below.