The Collaborative International Dictionary of English v.0.48:

anaphylactic \anaphylactic\ n. ([a^]n`[.a]*f[imac]*l[a^]k"t[i^]k
   or [a^]n`[.a]*f[i^]*l[a^]k"t[i^]k) (Med.)
   Of or pertaining to anaphylaxis; caused by anaphylaxis.
   [PJC]

WordNet (r) 3.0 (2006):

anaphylactic
    adj 1: related to the hypersensitivity known as anaphylaxis;
           "anaphylactic shock"

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "anaphylactic":
   allergic, delicate, empathetic, empathic, goosy, hyperesthetic,
   hyperpathic, hypersensitive, irritable, itchy, nervous,
   overrefined, oversensible, oversensitive, overtender, passible,
   prickly, refined, responsive, sensitive, skittish, supersensitive,
   sympathetic, tactful, tender, tetchy, thin-skinned, ticklish,
   touchy