A GABA transaminase inhibitor is an enzyme inhibitor that acts upon GABA transaminase.
Examples include valproic acid, vigabatrin, phenylethylidenehydrazine, ethanolamine-O-sulfate (EOS), and L-cycloserine.
Certain members of this class are used as anticonvulsants.
There is some evidence that Melissa officinalis (lemon balm), and the rosmarinic acid it contains, inhibits GABA transaminase.
References
GABA transaminase inhibitor Wikipedia(Text) CC BY-SA