“A radioimmunoassay (RIA) study showed that a single dose of cocaine increased the TRH level in the striatum by 68%, but had no significant effect on the peptide content in the nucleus accumbens, hippocampus, amygdala, septum, hypothalamus, frontal and prefrontal cortex at 45 min after the drug injection.”
“Repeated administration of cocaine increased the TRH level in the striatum by 89% at 45 min, and in the hippocampus by 26% at 72 h after the last dose.”