Review Erowid at
Help us be a "Top Rated Nonprofit" for the 12th year in a row
and spread accurate info about psychedelics and other psychoactive drugs.
("Share Your Story" link. Needs quick login creation but no verification of contact info)
The Hidden Potential
4-Fluoroamphetamine (4-FA, 4FMP)
Citation:   Student. "The Hidden Potential: An Experience with 4-Fluoroamphetamine (4-FA, 4FMP) (exp98117)". Dec 7, 2012.

T+ 0:00
90 mg oral 4-Fluoroamphetamine (powder / crystals)
  T+ 0:20 70 mg oral 4-Fluoroamphetamine (powder / crystals)
Chemical: 4-Fluoroamphetamine
Dose: Approximately 140 mg to 170 mg (powder/crystals)
Body: 70 kg or 155 lb
Age at time of experience: 19
Experience date: October 30, 2012
Duration of the effects: 8 hours

PROLOGUE: I am a 19 year old student. I have experience with Marijuana, Salvia, MDMA, Cocaine and Alcohol. Today I am writing about a designer drug 4-Fluoroamphetamine or 4-FA for short. A week before taking the drug my friend and I were discussing MDMA effects and how to obtain it. He suggested I looked up “4-FA”, not seeing any harm I decided to. Online it states that it is a designer drug with similar effects to MDMA. I decided to try it out and 1 week later it comes in the mail.

SETTING: The halls and classrooms of a university.


+0:00 - 1:00 pm – 90 milligrams, oral, I did not have any capsules so I decided to just take it plain on the tongue. I measured out 10 approximate portions of the 1 gram that I had and took one down the hatchet. It does not taste good; I immediately had to chase it with orange juice.

+0:20 - 1:20 pm – 60 milligrams to 80 milligrams, oral, did not feel anything and thought that I may have taken too little so I ingested some more. I decided to listen to some music since I know it’s going to be great.

+0:30 - 1:30 pm – I started feeling a bit more happy and joyful but not to the extent of being surprised by the fact. I took a bus to my school with a big smile on my face. On the bus I felt like my head was clear and my eyesight improved, as if I were more focused on what was going on around me.

+1:00 - 2:00 pm – Class 1 started and I felt very good, serotonin must have been released at this moment. At other times I am a bit more reserved during class 1 but not this time. I was answering questions, leading a discussion and socializing very easily. This is one of the first effects 4-FA had on me, extroversion and socialness. I am typically an introvert (likes to relax alone) and don’t have too many friends but that day I was talking to everyone with excitement in my voice. The class had about 50 people in it and the experience was similar to a presentation.

+2:00 - 3:00 pm – This is the start of the peak of the trip. I felt my heart beating fast (100 bps) while I was taking notes. I felt like the teacher was taking too long to explain the lecture therefore I decided to pull out notes from class 3 and started learning 2 subjects at once, still being involved in the previous discussion. At the peak it felt like a mix of MDMA and Cocaine, I felt like I could do anything, like I was superman, very euphoric. I was also very impressed with myself for taking on so many tasks and actually completing them.

+2:30 - 3:30 pm – Class 1 ended and whilst walking down the hall I noticed one of my acquaintances had a booth set up and was presenting his point of view. While socializing I gave him advice on how to improve said booth in order to attract more people, I felt very confident in my suggestion. I left with another acquaintance with whom I do not normally speak, this time I was carrying on a full out conversation with someone I had not spoken to in a year and did not enjoy being in his company.

+3:00 - 4:00 pm – Class 2 starts, it is my least favorite class and I usually slack off in it. Today I took major notes, listened and understood the concepts clearly. This is about the time I noticed my jitters. I had to tap my pen on my desk or move my hands in order to relieve the energy flowing through me. At this moment I also realized the dryness of my mouth. This is not a concern, just a mild annoyance and it can be cured with a stick on gum which I thankfully had.

+4:00 - 5:00 pm – Class 2 ended and I was on my way home. When I got home I felt extremely bored. Since I only had 30 minutes of free time I had to use them effectively, before leaving for school again. I started working out with interval training. I did not get tired at all, sweaty, but not tired. While at home I noticed that my appetite was suppressed, even if I did want to eat I would not have been able to so I went back to school.

+5:00 - 6:00 pm – At this moment while studying for class 3’s upcoming quiz I started coming down. I was a bit scared, I knew that 4-FA made me a better learner, but I wanted the effects to last through the quiz in order for me to receive a good grade. At this moment I thought of having more. Unfortunately the rest was at home which was a 15 minute bus ride away was and if I had gone I would have surely missed the quiz. The dose would also give me another 8 hours of energy which I did not need so I left the hopes of having more and went to class 3.

+6:00 - 7:00 pm – I was on my 4th piece of gum in 3 hours, now this may not seem so strange to some but gum usually lasts longer. My fears of the drug’s effects fading away, faded away (see what I did there) when I received my quiz. I remembered almost everything that I had learned in the previous hour and felt very confident with my answers. During the class I took notes very quick like which meant that the drug was still in my body even after 6 hours. It did not worry me since some MDMA trips lasted up to 10 hours.

+8:30 - 9:30 pm – When the class was over I felt off my buzz, I have returned to Earth and was a regular human again. This was not a cause for concern because I had a great day, I did not yearn for more which is good, that meant 4-FA is not addictive, or at least not to the point of Gollum (my precious!). On the way back home with 3 of my friends on the bus I did not feel the constant need for social interaction. I stayed quiet for most of the ride, sometimes answered their questions or threw in my 2 cents. The weather was about 11 degrees Celsius or 52 degrees Fahrenheit. I noticed that I am not as cold as I thought I would be. On MDMA sometimes hypothermia sets in (in my case every time I did it) and the weather usually felt colder than it was. I was mildly surprised that I was not shaking or trying to warm up.

+9:00 - 10:00 pm – At home, good atmosphere, warm rooms and plenty of comfort. I felt the effects wore off but a nice afterglow still lingered. It made me awake, not Coked up but as if I drank an espresso. I started playing some music again and just listened to the vibes, relaxing.

+10:00 - 11:00 pm – Hey! I know, I’m going to write an experience report since they have helped me so much with stories and information. Still very awake I started writing.

+12:30 - 1:30 am – Finished the report, posted it and went to sleep. No sleep problems, fell asleep normally (in 7 minutes) and no hangover the next day.

PROS: The good effects of 4-FA include mood elevation, increased energy, euphoria, increased focus and mental functions, it becomes very easy to socialize and my confidence gets a boost, no hangover the next day, if used for work I would get a lot done.

NEUTRALS: The effects that accompanied the trip but don’t make any significant changes in the trip. Increased heart rate, dry mouth and suppressed appetite.

CONS: Increased heart rate and suppressed appetite, now these are both neutral and cons because they could carry long-term effects, can last a long time if not prepared for it, feeling tired after the trip.

OVERALL: I really liked this drug, I was looking for an MDMA experience and I got it. Definitely will do it again, maybe in two weeks. I would not recommend any intake other than oral since it burns like the deepest fires of hell if you snort it and it does not work as well if smoked, I don’t know anything about injecting it.

As I mentioned before I was looking for an MDMA experience and found that this comes very close to the perfect duplicate, but how close?

• Effects included euphoria similar to MDMA, increased energy, mood elevation, extroversion and socialness, bruxism, and suppressed appetite. After the drug had run its course there was barely any hangover or a recovery period.
• Less popular and unknown.
• 4-FA produced less hyperthermia than MDMA.
• Effects began within an hour after ingestion and typically lasted anywhere between 4-10 hours. Common dose range was 80-150 mg, usually taken orally.
• Unscheduled.
• Little to no pupil dilation.

• MDMA induced a strong sense of inner peace and self-acceptance, diminished fear, anxiety, extreme mood lift with accompanying euphoria, feelings of intimacy and even love. After the drug had run its course, I feel fatigue; diminished mental capacity, and impaired cognitive ability.
• Very popular in “rave” scenes, much more known than 4-FA.
• MDMA produced more hypothermia than 4-FA.
• Took effect within 45 minutes to an hour of consumption, hitting a peak at 2.5 to 3 hours, and lasted 3-4 hours.
• Common dose range was 80 - 150 mg.
• MDMA is criminalized in most countries.

In my opinion 4-FA is a cheaper version of MDMA that is unscheduled or not controlled in many countries with a longer trip without a big hangover or a recovery period. I think that MDMA’s effects are more superior to those of 4-FA. Overall 4-FA is an adolescent compared to the adult Ecstasy.

Sorry for writing so much and thank you if you read all of it, hope it helped.

Resources used:

I know Wikipedia might not be a reliable source school wise but it is a winner in my book.

Exp Year: 2012ExpID: 98117
Gender: Male 
Age at time of experience: 19
Published: Dec 7, 2012Views: 39,902
[ View PDF (to print) ] [ View LaTeX (for geeks) ] [ Swap Dark/Light ]
4-Fluoroamphetamine (276) : School (35), Retrospective / Summary (11), First Times (2)

COPYRIGHTS: All reports copyright Erowid.
TERMS OF USE: By accessing this page, you agree not to download, analyze, distill, reuse, digest, or feed into any AI-type system the report data without first contacting Erowid Center and receiving written permission.

Experience Reports are the writings and opinions of the authors who submit them. Some of the activities described are dangerous and/or illegal and none are recommended by Erowid Center.

Experience Vaults Index Full List of Substances Search Submit Report User Settings About Main Psychoactive Vaults