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Dehydroxyfluorafinil

This article is a stubmissing:
Pharmacology
Interactions
Tolerance
History & Culture
Dehydroxyfluorafinil molecule structureDehydroxyfluorafinil molecule structure
N-Methyl-4,4'-difluoro-modafinil
N-Methylbisfluoromodafinil, Modafiendz, Fiendz
Psychoactive Class
NootropicEugeroicStimulant

Dosage & Duration

Dosage

Doses are population estimates that vary widely between individuals.

Threshold~50 mg
Light50-100 mg
Moderate100-150 mg
Strong150-200 mg
Heavy200+ mg

Duration

Onset30-60 minutes
After Effects2-24 hours
Total5-8 hours

Subjective Effects

Legacy content. A statistically backed ontology from Mindstate Design Labs is coming soon.

Effects vary widely by individual, dose, and context.

Physical

Increased heart rateDizzinessNausea

Cognitive

Focus enhancementWakefulnessThought accelerationMemory enhancementMotivation enhancementEmotion enhancementAnxiety
Forked from Subjective Effect Documentation byJosie Kins July 2016.

Pharmacology

Pharmacology not written up yet

Interactions

Interactions not written up yet

An unlisted combination is an unknown one, not a safe one. Check a dedicated combination chart before mixing.

Check TripSit

Tolerance

Tolerance not written up yet

Harm Potential

Toxicity

Cardiovascular

Internet reports mention jitters and vasoconstriction.

History & Culture

History & Culture not written up yet

Legality

International

Legally available as a non-prescription stay-awake product circa 2015.

References

Source Pages

  1. Bluelight: Legal high similar to speed (UK)
  2. Bluelight: N-Methyl-4,4-Difluoro-Modafinil
  3. Drug Users Bible - Modafiendz
  4. Drug Users Bible by Dominic Milton Trott
  5. PsychonautWiki: N-Methylbisfluoromodafinil
  6. Wikipedia

Further Reading

  1. BenchChem listing (CAS 1613222-54-0)
  2. Cayman Chemical product information PDF
  3. Cayman Chemical product page
  4. Drugs.com - Caffeine × Modafinil interaction
  5. Drugs.com - Modafinil interactions list
  6. PubMed: Modafinil half-life study
  7. Reddit: / r/Nootropics – New eugeroic Modafiendz
  8. Reddit: / r/researchchemicals – Dose comparison
  9. UK Psychoactive Substances Act 2016
  10. Wiley - Thermal degradation of modafinil analogs (DOI)
  11. ZeptoMetrix Modafiendz product page

Article Status

  • Josie Kins avatar
    Step 1 · Automated synthesis

    An autonomous workflow built by Josie Kins compiled this article's foundation from information published across the web.

  • Step 2 · First-pass reviewPending

    Not yet reviewed — this article is pending editorial review by Lyrea.

  • Step 3 · Citation reviewPending

    No one has reviewed this article's citations yet. That second pass checks each claim against the source it cites.

Recent changes7 human edits · latest

Times are UTCNewest first

24 January 2026

  1. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  2. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  3. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  4. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  5. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  6. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  7. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

All changes to this article · Site-wide recent changes

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