Ik heb er zelf totaal geen ervaring mee, hopelijk heb je hier wat aan.
Reports suggest that metabolites of 3-FPM have a long half-life, causing residual stimulation which lingers for several hours after administration. Side effects will increase with the amount of material consumed in a session.https://psychonautwiki.org/wiki/3-FPM
I similarly was pretty tired the following days after a minor 3FPM binge (600mg over 10 hours). Unfortunately it does seem to be the fact that it has a long half life, i felt noticeably stimulated even a day (with no sleep that night) after that binge, and even slightly 2 days after that.
I didn't sleep very well, and it didn't feel like quality sleep either.https://www.reddit.com/r/researchchemicals/comments/35gasw/halflife_of_mephenmetrazine_and_3fpm/