“ Hexamethonium and methylatropine, also ineffective by themselves, potentiated the effect of amphetamine but not that of tyramine.”
“The results suggest that amphetamine and tyramine enhance pseudoconditioning through activation of a peripheral adrenergic mechanism and that amphetamine , in addition, triggers an opposing cholinergic mechanism, also peripheral, from which it can be released by the anticholinergic agents hexamethonium and methylatropine.”