Alexipharmic /(ȧ*lĕks`ĭ*fär"mĭk)/

A·lex·i·phar·mic

Alexipharmic

a.
  1. Of or relating to an alexipharmic or alexipharmac; warding off poison; antidotal; prophylactic. (Med.) [obsolescent]

Alexipharmic

n.
  1. An antidote against poison; a counterpoison. (Med.) [archaic]