allergenic

from WordNet (r) 3.0 (2006)

allergenic
    adj 1: relating to or having the effect of an allergen

from The Collaborative International Dictionary of English v.0.48

allergenic \allergenic\ adj.
   1. of or pertaining to allergens or allergenicity.
      [WordNet 1.5]

   2. causing an allergy or an allergic reaction.
      [PJC]