lumbar punctures were carried out prior to treatment and at the end of each dosage regimen and cerebrospinal fluid ( csf ) evaluated for concentrations of free and total gaba , homocarnosine ( gaba-histidine dipeptide ) , homovanillic acid ( hva ) , 5-hydroxyindole acetic acid ( 5-hiaa ) and vigabatrin .
C0016904
gaba
C0048044
vigabatrin