seidlitz powders

/S AY1 D L IH0 T S P AW0 D ER0 Z/
noun
  1. 1

    A digestive and laxative, composed of a mixture of tartaric acid, sodium bicarbonate, and potassium sodium tartrate.

Source: https://en.wiktionary.org/wiki/seidlitz%20powder, https://en.wiktionary.org/wiki/seidlitz%20powders