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Definition of Convulsants
1. convulsant [n] - See also: convulsant
Medical Definition of Convulsants
1. Substances that act in the brainstem or spinal cord to produce tonic or clonic convulsions, often by removing normal inhibitory tone. They were formerly used to stimulate respiration or as antidotes to barbiturate overdose. They are now most commonly used as experimental tools. (12 Dec 1998)