“Chronic treatment with L-histidine (750 mg/kg) plus METH inhibited the METH-induced argumentation of stereotyped behavior, while that with FMH (100 mg/kg), pyrilamine (5 mg/kg) or zolantidine (5 mg/kg) potentiated it.”
“Pretreatment with a … of HA, L-histidine (750 mg/kg), … inhibited the METH (3 mg/kg)-induced stereotyped behavior, whereas pretreatment with an inhibitor of HA synthesis, α-fluoromethylhistidine (FMH) (100 …/kg), an H1 antagonist pyrilamine (5 mg/kg) or an H2 antagonist zolantidine (5 mg/kg) enhanced it.”