It is believed that vigabatrin increases brain concentrations of gamma-aminobutyric acid (GABA), an inhibitory neurotransmitter in the CNS, by irreversibly inhibiting enzymes that catabolize GABA (gamma-aminobutyric acid transaminase GABA-T) or block the reuptake of GABA into glia and nerve endings. Vigabatrin may also work by suppressing repetitive neuronal firing through inhibition of voltage-sensitive sodium channels.

Vigabatrin, is an anticonvulsant chemically unrelated to other anticonvulsants. Vigabatrin inhibits the catabolism of GABA. It is an analog of GABA, but it is not a receptor agonist. Vigabatrin irreversibly inhibits the enzyme GABA transaminase.

Almost no metabolic transformation. Does not induce the hepatic cytochrome P450 system.

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