Topiramate lithium (McN 4853) is a wide-ranging antiepileptic compound with GluR5 receptor antagonistic properties. Its mechanism of action involves enhancing GABAergic activity, inhibiting kainate/AMPA receptors, voltage-sensitive sodium and calcium channels, and increasing potassium conductance. Additionally, this compound inhibits carbonic anhydrase. [1][2][3]

Topiramate lithium has been believed to be a type of antiepileptic drug that blocks spread of seizures. Thus far, the mechanisms of its actions have been proven to include use-dependent inhibition of voltage-dependent Na+ channels in neurons, potentiation of GABA (γ-amino-butyric acid)-induced Cl- influx, and inhibitory effects on inward currents by antagonizing kainate/alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) receptors [2].