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“Conversely, levels of some metabolites associated with inhibitory neurotransmission, including GABA and glycine were reduced by acute (5.0 mg/kg) MPH , together with acetate, aspartate and hypoxanthine.”
European Neuropsychopharmacology • 2018 | View Paper
“Acute MPH treatment increased the levels of a number of cerebral metabolites, including amino acid transmitters (e.g. GABA and glutamate) and aromatic amino acids (e.g. tyrosine and phenylalanine).The upregulated metabolites may elevate both cerebral excitatory and inhibitory neurotransmission processes.”
“Both methylphenidate and methamphetamine, dopamine reuptake blockers, inhibited by 30% high K(+)-evoked GABA release; the inhibition was blocked by L-745,870.”