The Collaborative International Dictionary
Antidotary
Antidotary \An"ti*do`ta*ry\ ([a^]n"t[i^]*d[=o]`t[.a]*r[y^]), a. Antidotal. -- n. An antidote; also, a book of antidotes.
Wiktionary
antidotary
a. antidotal n. 1 An antidote. 2 A book of antidotes.