An obsolescent anticonvulsant used for the treatment of absence seizures (petit mal) and psychomotor epilepsy. SYN: troxidone.
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tri·metha·di·one .trī-.meth-ə-'dī-.ōn n a crystalline anticonvulsant C6H9NO3 used chiefly in the treatment of absence seizures see TRIDIONE
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tri·meth·a·di·one (tri″meth-ə-diґōn) an anticonvulsant with analgesic properties, used for the control of petit mal seizures, administered orally. In veterinary medicine, used as an anticonvulsant and analgesic for cats. Called also troxidone.Medical dictionary. 2011.