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Tricky Dosing Less Well-Documented Substance
4-Fluoromethamphetamine & Beer
by Henk
Citation:   Henk. "Tricky Dosing Less Well-Documented Substance: An Experience with 4-Fluoromethamphetamine & Beer (exp114928)". Nov 17, 2020.

T+ 0:00
9 mg oral 4-Fluoromethamphetamine (capsule)
  T+ 1:20 74 mg oral 4-Fluoromethamphetamine (capsule)
  T+ 3:05 68 mg oral 4-Fluoromethamphetamine (capsule)
  T+ 0:00   repeated oral Alcohol - Beer/Wine  


I had purchased 1 gram of 2C-E and 2.5 grams of 4-FMA from an online RC vendor. So far this RC vendor always delivered what was promised.


In the fluorinated class of stimulants I have previously tried 2-FA, 2-FMA, 3-FPM and 4F-MPH. I also have a lot of experience with speed (amphetamine). I am interested in these compounds, to see if they can be useful as stimulant on some occasions. However, I notice I only try them a few times and never really feel the need to do them again.

Set and setting

Woke up around 11:00 in the morning. Was working on a project during the day. Started drinking beers at around 14:00. I had a large dinner at around 20:00. It was a nice day. I quit working on the project at about 22:00. Around 22:30 I decide I would try the 4-FMA to see if it produces any euphoria and get some experience in writing a report that might be useful to others. I had done a little bit of speed earlier this week. I do not use medicine or other supplements.

I usually go for low doses, as I feel determining the right dose of a stimulant is better than just overdoing it.


T -01:20: Took 9 mg in a capsule to test if this isn't mistakenly some other compound with a way lower threshold.

The coming 1 hour and 20 minutes I feel a little bit warm, not sure if it was related to the dose. I might be feeling a very slight bit of tactile enhancement, not sure though. I decide to try a dose in the "common" range as noted on psychonautwiki. I weigh out 74 mg in a capsule. As I'm weighing out I decide it's probably not a good idea to keep the baggy of 2C-E in the same spot as the 4-FMA. Accidentally dosing 74 mg of 2C-E would be bad. I was already paranoid that I might had mistaken myself. I move the 2C-E to the spot where the other psychedelics are stored.

T +00:00 (also midnight, coincidentally): Took the 74 mg capsule after feeling this is not mistakenly also 2C-E, which I purchased at the same time. At this time I'm listening to some techno music, drinking beers and reading a bit online.

T +00:18: Not yet really feeling any different so far.

T +00:31: Maybe an alert, not sure.

T +00:49: Bit of goosebumps

T +01:00: Feel a bit warm, perhaps slightly energetic than baseline.

T +01:15: Feel just slightly "up", but still have the felling I could go to bed now and sleep just fine.

T +01:28: I actually feel a bit hungry. I contemplate eating but decide not to. If nothing changes planning on heading to bed soon.

T +01:45: Instead of going to bed I redose 68 mg in a capsule.

T +02:16: Feel a little more awake than before redosing, no euphoria. I've probably drank about 4 more beers (0.25-0.3L bottles) since midnight. Probably around 12 beers since waking up.

T +02:42: I decide to go to bed, feeling tired. I sleep within 10 minutes after getting to bed.

T +05:00: I woke up to go to the toilet, I had diarrhea. Not sure if related to the compound or if I ate too much products with lactose (I am lactose intolerant).

T +11:00: I wake up still a bit tired. It wasn't the best sleep but I think the alcohol and perhaps too little sleep during the week are more likely to blame than the 4-FMA.

T +12:00: Feel slight dehydrated in an amphetamine way, different than the dehyrated feeling after just alcohol. No headache, but my head feels a bit heavy. It feels like it's going to be a productive day though.

Summary, insights

My first experience with 4-FMA was not very spectacular. On the Shulgin scale it is a (+/-), I'm not entirely sure if I reached threshold effects or if that was placebo.

I feel this compound might be similar to MDMA for me, where low dosages hardly do anything at all (<80 mg). Then there is a sweet spot with the good stuff (100-140 mg), and dosing way too much where it does not produce any added effects when redosing the second or third time (~500 mg in one sitting), but does leave me shaky for a week and increases my HPPD symptoms.

I really expected to get a response at this dose. I will probably try this again, but it might be a few months before I get to it. If it does produce a response I will do my best to write a report, since little is documented about this compound.

Finally, I should note it's neither common nor uncommon for me to sleep after taking stimulants (or psychedelics for that matter). I just want to state this in order to indicate that taking the same dose of 4-FMA with work out differently for others.

Especially caffeine I have seem to have developed a huge tolerance to the past 14 years. I can consume 1-1.5 grams of caffeine during the day without feeling jittery and can be seen falling asleep within 30 minutes after taking a 300 mg caffeine capsule. I have also on numerous occasions slept through the come-up phase of LSD. Finding myself to wake up tripping, then usually stumbling to bed and continue sleeping. However, a recent experience with 18 mg of 2-FMA left me awake for 12 hours.

After reading up on other 4-FMA reports, it really goes to show every substance affects everyone differently.

Exp Year: 2020ExpID: 114928
Gender: Male 
Age at time of experience: 29 
Published: Nov 17, 2020Views: 2,616
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4-Fluoromethamphetamine (580) : First Times (2), Combinations (3), Alone (16)

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