“The dose-dependent amphetamine antagonism to the behavioural effects of THC was paralleled by a dose-related increase in brain dopamine concentration.”
“The THC effects, which included a reduction in spontaneous locomotor activity, the development of prostration, and circling behaviour, were antagonized in a dose-dependent manner by pretreatment with amphetamine.”
“This elevation in dopamine levels may be instrumental in triggering the neuronal events responsible for the amphetamine antagonism of the actions of THC.”