a. and sb. [a. F. convulsant, pr. pple. of convulser to CONVULSE.]
A. adj. Producing convulsions. B. sb. A drug that produces convulsions.
1875. H. C. Wood, Therap. (1879), 234. Porphyroxia the most powerful of all the convulsant opium alkaloids. Ibid., 232. Claude Bernard ranks narcotina above morphia as a convulsant in the lower animals.