yes, what I was alluding to is that the majority of stimulants function via some sort of interruption of catecholamine metabolism (i.e adrenaline, norepinephrine, dopamine). Take for example ephedrine and other amphetamines/phenethylamines, caffeine, yohimbine, etc. My intentions are merely to redirect any readers from what their connotation of the term, stimulant, may be.