Phenylethylidenehydrazine (PEH), also known as 2-phenylethylhydrazone or as β-phenylethylidenehydrazine, is a GABA transaminase inhibitor. It is a metabolite of the antidepressant phenelzine and is responsible for its elevation of GABA concentrations. PEH may contribute to phenelzine's anxiolytic effects.
See also Phenelzine
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