The Collaborative International Dictionary of English v.0.48:

Antapoplectic \Ant`ap*o*plec"tic\
   ([a^]nt`[a^]p*[-o]*pl[e^]k"t[i^]k), a. [Pref. anti- +
   apoplectic.] (Med.)
   Alleviating apoplexy. -- n. A medicine used for alleviating
   apoplexy. [Obs.]
   [1913 Webster + AS]