symptomatic reaction

symp·to·mat·ic re·ac·tion

an allergic response similar to the original one, but occurring after the use of a test or therapeutic dose of an allergen or atopen.

symp·to·mat·ic re·ac·tion

(simp'tŏ-mat'ik rē-ak'shŭn) An allergic response similar to the original one, but occurring after the use of a test or therapeutic dose of an allergen or atopen.