While three-FEA has not been formally studied on exactly the same level as classic amphetamines, it really is currently assumed that like other substituted amphetamines with substitutions at very similar positions, it probably functions primarily like a triple reuptake inhibitor and/or releaser on the monoamine neurotransmitters serotonin, dopamine, and norepinephrine. https://shanefrdjo.blogdon.net/5-simple-statements-about-2-3-fea-pellets-40mg-120mg-explained-44144910