Zepehydrine

Zepehydrine (zeh-fee-dreen) is a blue pill that is used to chill and purify water, no matter what its source may be. Its name is based on that of Zephyrhills, a company that manufactures bottled water.

It, along with Hydefrizene, was used by the Doctor in Azumanga Who and was in a Pill Box with eighteen other kinds of pills. They also appeared during the conception of A Poor Man's Christmas.