Source : Webster's Revised Unabridged Dictionary (1913)

Excitative \Ex*cit"a*tive\, a. [Cf. F. excitatif.]
   Having power to excite; tending or serving to excite;
   excitatory. --Barrow.

Source : WordNet®

excitative
     adj : (of drugs e.g.) able to excite or stimulate [syn: {excitant},
            {excitatory}]