2-FA Well-documented

Well-documented

Multiple authoritative sources agree on dosing and effects.

4 corroborating sources

1 ROA with full dose ladder

duration data present

29 combo interactions documented

toxicity data (PsychonautWiki)

classified Research-chemical

Aliases: 2-fmp, 2-fluoroamphetamine, 2fa

Summary dose.wiki TripSit PsychonautWiki

2-FA is a research chemical with limited scientific study. Anecdotal reports suggest it produces clean, functional stimulation similar to dextroamphetamine, with relatively few side effects at moderate doses. However, at higher doses productivity effects diminish and recreational overstimulation can occur.

Dose Information dose.wiki TripSit

ROA	Light	Common	Strong	Heavy
Oral	5-15mg	15-30mg	30-50mg	50mg+

Light Common Strong Heavy

Sources

Oral

Dose ladder — dose.wiki, TripSit

Onset, Duration & After-effects dose.wiki TripSit PsychonautWiki

ROA	Onset	Comeup	Peak	Offset	After Effects	Total
Oral	15-30 min	15-30 min	1-2 hrs	60-90 min	1-4 hrs	2.5-4.5 hrs
Insufflated	5-10 min	10-15 min	1-2 hrs	60-90 min	1-4 hrs	2.25-3.92 hrs

Effect Profile

4 reports

Scores (0–10) curated from multiple sources:

Effect keyword matching from PsychonautWiki catalog
Weighted by importance: core (×3), major (×2), minor (×1)

Full methodology

Stimulant 6.6

Strong+ 7/10

Strong euphoria and focus with strong anxiety/jitters, mild stimulation

Stimulation / Energy ×3

stimulation wakefulness

Euphoria / Mood Lift ×2

physical euphoria cognitive euphoria euphoria mood lift motivation enhancement

Focus / Productivity ×2

focus enhancement analysis enhancement motivation enhancement thought acceleration

⚠ Anxiety / Jitters ×1

anxiety paranoia increased heart rate teeth grinding bruxism vasoconstriction +1 more

Based on reports from:

Erowid Experience Reports

Tolerance

Build-up develops over days to weeks of regular use

Reset 3–7 days for acute; 1–3 weeks for full reset

Tolerance Decay

Full tolerance 4d Half tolerance 7d Baseline ~28d

Based on community reports (Bluelight/Reddit) and general amphetamine-class behavior; no controlled human data for 2‑FA. Frequent redosing over several days appears to flatten effects and lengthen insomnia. Data quality is anecdotal.

Cross-Tolerances

Amphetamine

Methamphetamine

Other fluoroamphetamines (2‑FMA, 3‑FA, 4‑FA)

Effects Erowid

Aggregated from 4 single-substance Erowid experience reports; 1 Erowid reports where another drug was taken too are left out

Each bar shows the share of analyzed reports whose text mentions that effect — a mention is not always a first-hand experience (fear of an effect or something witnessed can count). Mentions saying the effect did not happen are left out; that check reads keywords, so it can miss some. The shaded band on a bar, and the small range after its number, is the 95% interval: where the share could plausibly be with other reports of the same kind. Fewer reports, wider band. Tap or hover any number for details. The second value is the Bluelight extractor's per-effect confidence; a dash means the row is Erowid-derived, which has no confidence measurement.

Too few reports for bars: these effects come from 4 single-substance Erowid reports, and a bar is drawn only from 20 reports or more. With fewer, a percentage cannot tell a common effect from a rare one. Counts are shown instead. Why 20?

Positive Effects 1

4 of 4 –

Adverse Effects 0

Combinations

Cross-Check 2-FA with another substance

Community Trip Reports

Anecdotal first-person accounts from Reddit, Erowid, Bluelight, and Dose.wiki. Click a source to expand. Reports are harm-reduction context, not medical guidance. Tags summarise each author's own verdict — how reports are classified.

Erowid 4 reports 3 positive 1 neutral visit

I've Enjoyed It but Also Cursed It Many Times positive exp #116606

Detailed Report of General Effects of 2-FA I am writing this report as a way to share my experience with this compound that I've enjoyed but also cursed many times of the past year or so since first discovering it.

So Fresh and So Clean positive exp #101915

Age: 27 Gender: Male Dose: Repeated MOA: Various Set: Collected mindset. Excited to attempt experiments with a new compound so closely related to one I have already come to know and love.

A Care-Free Evening positive exp #116260

First Chemical Experience At a Sunday evening, after a lot of investigation on trustworthy websites, I planned to do my first chemical experience at home. Before I took the first pill, I already was in a good mood.

Smoother than Adderall neutral exp #98592

I have been taking Adderall off and on for the past 7 years (prescribed). So I would say that I likely have some tolerance to amphetamines. I took this dose of 2-FA around noon on a day that I did not take Adderall or any other psychoactive substance. After I dosed, I went to lunch with a friend.

Bluelight 2 threads 2 neutral visit

2 Fa First Time Clean And Smooth But Somewhat Mild neutral

Trip Report 2-Fluoroamphetamine 11-10-10 Set: I am a male of 25 years old, 125 lbs, my experience with psychoactives is extensive: most of the common 2C-X, about 5 different substituted tryptamines, AMT, nitrous, cannabis, GHB, benzo’s, MDMA, LSD, DMT, DPT, 5-MeO-DMT, DOB, cannabis, amphetamine, 4-FMC, 4-MMC, ethcathin...

2 Fa Unknown Dose First Time Fairest Fluoroamphetamine Of Them All neutral

Just got my first batch of 2-FA and decided to leave a quick report since there's not much written about it compared to the other RC stims... BACKGROUND Dose: Unknown. Little bumps orally and nasally throughout the day. Probably in the 200-300 mg range over 24 hours. ROA: Mostly oral with a few nasal bumps.

2-FA's nerd page Pharmacology, chemical data, effect profiles, and more

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Helpful Links

📘 Experience Reports 📖 dose.wiki 📖 PsychonautWiki

Add missing routes to PsychonautWiki Journal

The PsychonautWiki Journal app already has 2-FA, but its built-in entry only covers Oral. Here are the other routes we have data for. You can't edit a built-in substance, but you can add a Custom Unit for any of these routes to log it.

⬇ Download import file Import this file as custom substances and you get "2-FA (Substance Search)" with every route's full dose ladder and timeline, no typing. Works on iOS and Android (v15+); the format is confirmed by the app's developer. The manual values below work for older versions.

Duration (reference)

2-FA: routes the PsychonautWiki Journal app is missing
Source: SubstanceSearch (substancesearch.com)


Insufflated duration: onset 5-10m · come-up 10-15m · peak 1-2h · offset 1-1.5h · total 2.25-3.92h · after-effects 1-4h

Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.

Ranges are harm-reduction guidance, not a prescription.

Report an issue or suggest an edit

Spotted incorrect or dangerous information, have a correction, a new study, or a useful addition for 2-FA? Let us know. Reports are reviewed by moderators — this is not posted publicly.

2-FA Well-documented Well-documented Multiple authoritative sources agree on dosing and effects. 4 corroborating sources 1 ROA with full dose ladder duration data present 29 combo interactions documented toxicity data (PsychonautWiki) classified Research-chemical