Here are my experiences with 3-FPM:
It's a great substance. In low doses orally it can be used as a very functional stim with little to no negative side & after effects. A low dose for me is 30mg-50mg orally.
In higher doses it's great for partying. I usually take 80mg orally & the effects kick in after 20-40min, first signs usually are a better mood, some pleasurable tingling, feeling more awake.
When I'm at a rave, I redose at least 4-6 times (by either taking a capsule I prepered or by snorting a line - the redose capsules are 60-80mg, the line would be around 50mg). That way I feel pretty intoxicated & stimulated the whole time. I also get an empathogenic feeling, it really feels like some serotonin action is going on. Euphoria, empathy, tactile enhancement.
It's also great for chemsex / stimfapping (which I discourage, makes you feel like shit afterwards & is addicting as fuck). It doesn't seem to fuck with the ability to get an erection as much as Amphetamine does.
I tried two different batches in the last 2 months, one was small white crystals (didn't burn much when snorted), one was a white powder (burned a lot when snorted). Both worked perfectly well.
btw, snorting is more fiendish & can be pretty hurtful & tastes like shit. I like to do 1-2 lines at a party though. If taken as a functional stim I only use it orally.
I also tried sublingual, which was a mistake. I got a chemical burn under my tongue, that hurt for 2-3 days.
Combinations I've tried:
- 3-FPM + Amphetamine: It worked as expected. If I have enough 3-FPM I wouldn't take Amphetamine though. Pure 3-FPM feels better. But a line speed as a booster / if it's offered by a fellow raver didn't hurt.
- 3-FPM + Mephedrone: Gave me a really weird Mephedrone roll. Didn't feel good. Had symptoms of serotonergic Empathogenic overdose - jittery view, confusion. Without the euphoric effects. This experience isn't really meaningful though, since I was awake for 50h at that moment, raving the second night in a row.
- 3-FPM + O-Desmethyltramadol: No negative effects noted, no cramps / seizures. I'm used to opioids though (daily kratom user). I used a moderate dose of ODSMT an hour before taking the 3-FPM with the intent to lower pain & physical discomfort while raving. It definitely did that. Not really safer use though.
- 3-FPM + Clonazolam: I almost killed myself with that combination. Not via toxicological means. I snorted 3-FPM alone in my room in the evening (this was about 9 years ago, back when I lived with my dad), chatted with a friend & got the "great" idea to try the benzo-upper combo. So I took some Clonazolam, felt pretty good, layed down & smoked a cigarette. The next thing I know is waking up with a big hole burned into my matrace. Never happened to me before & after that.
It's also one of the few good stimulants legal in my country right now, so I love it even more :D