antidotary

Relating to or being an antidote, antidotal.

A lerned man may hereby gathere that the doctore havyng an evil conscience […] poysoned hymself […] but, as it semeth by conjecture, receavyng suche chearefull message by poste from the commissyoners, wold have recovered hym selfe by medicyne, to late taken; for nuttes, rew, and fygges, ys a good antidotary preservative agaynst poysone, being taken in tyme.

It is a gross mistake to suppose that the apothecary’s shop contains a remedy for every disease, or that medical skill consists in prescribing an antidotary drug […]

An antidote.

[…] he saith that some Jasper stones are found having in them the livelie image of a naturall man, with a sheeld at his necke and a speare in his hand, and under his feete a serpent: which stones so marked and signed, he preferreth before all the rest, bicause they are antidotaries or remedies notablie resisting poison.

A book of antidotes or pharmacological preparations.

In the Antidotaries of the Ancients, we find a great many Physical Compositions which seem to be wholly design’d for the Liver […]

1851, Review of Pharmacy of the Greeks and Romans by M. Cap, translated by W.H. Cobb, Western Journal of Medicine and Surgery, Volume 7, Number 5, May 1851, p. 377, Galen called all medicines administered internally, antidotes; thence, the word antidotary was for a long time employed synonymously with dispensary, or pharmacopœia.