Huh, very interesting. I haven't heard about this side of things yet. Good to know, especially being that I am some kind of needle-freak and am probably destined for IV trails sooner or later
Anyways, I haven't read much about IV use of the 4-flouro amps just because I have been unable to find information on it. However, the reports I have read about oral / nasal usage seem to have some differences. Maybe its just because of the elongated timespan / smoother come up and come down. From what I have heard and read about it, I've made it out to be kind of like amphetamine, but with a much heavier serotonergic component. Some even compared it to lightly rolling. Having taken waaay to much MDMA in my time, I doubt it will feel like that to me, but I still expect a decent level of serotonergic activity / euphoria.
And
hopefully, the difference between 4-flouro
amphetamine and 4-flouro
methamphetamine will be the similar to the difference between amp and methamp, as that would mean 4-FMA is likely very euphoric.