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Armodafinil

Armodafinil molecule structureArmodafinil molecule structure
(R)-Modafinil
Nuvigil, Waklert, Artvigil, R-Modawake, Neoresotyl

Armodafinil is a eugeroic substance of the benzhydryl class, consisting of the enantiopure (R)-enantiomer of the racemic mixture modafinil.citation needed Approved by the FDA in 2007,1 it is prescribed to treat excessive sleepiness associated with narcolepsy, obstructive sleep apnea, and shift work disorder.1 Compared to racemic modafinil, armodafinil is considered more potent and longer-acting.2 Its effects are primarily functional and wakefulness-promoting rather than overtly recreational.

Dosage & Duration

Dosage

Doses are population estimates that vary widely between individuals.

Threshold~20 mg
Light40-100 mg
Moderate100-200 mg
Strong200-300 mg
Heavy300+ mg

Taking armodafinil early in the morning helps reduce the likelihood of sleep disturbance; doses taken later in the day can lead to insomnia and resulting tiredness. Consuming food alongside the dose may delay peak blood levels by approximately 2 to 4 hours, which can influence both the onset and duration of effects. Some individuals have reported experiencing unexpected drowsiness.

Duration

Onset20-60 minutes
Come Up1-2.5 hours
Peak4-7 hours
Offset2-5 hours
After Effects2-12 hours
Total8-15 hours
Half-life
~15 hours

Subjective Effects

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

The armodafinil experience is overwhelmingly functional rather than recreational, centering on a smooth and sustained suppression of fatigue and sleepiness with little else accompanying it. Users who take it while drowsy or mentally tired typically describe simply no longer feeling tired, without a pronounced sense of stimulation or euphoria. Its long duration is a defining feature: doses taken in the afternoon can prevent proper sleep that night and leave the user more fatigued the following day, so early-morning dosing is generally considered advisable. Rarely, hallucinations have been reported as an adverse reaction, particularly in overdose.

Physical

Body load is generally light, with most users not feeling notably stimulated. The most common physical complaints are headache, dry mouth, nausea, dizziness, and difficulty sleeping, with appetite suppression, tremor, and thirst also reported. Overdose can produce restlessness, chest pain, and significantly increased or decreased heart rate along with elevated blood pressure.

Stimulation

Physical stimulation is characteristically subtle; the experience is often described as an absence of tiredness rather than the presence of energy.

Appetite suppression

Uncomfortable

Dry mouthNauseaDizzinessTremors

Cognitive

The headspace is clear and unremarkable, characterized by wakefulness and sustained mental arousal rather than any distinct alteration of thought or mood. Anxiety, irritability, or low mood can occur as adverse reactions, and euphoria alongside markedly increased activity and talkativeness has been reported in a minority of users.

Emotional

Emotional effects are typically minimal at therapeutic doses, appearing mainly as adverse reactions in susceptible users.

Anxiety

Enhancements

Pharmacology

Pharmacodynamics

The precise mechanism of action of armodafinil is not fully understood.3 Its best-characterized activity is binding to the dopamine transporter (DAT) and inhibiting dopamine reuptake,citation needed functioning as an atypical dopamine reuptake inhibitor. This activity is associated with increased extracellular dopamine levels.2 Evidence also suggests it may block the norepinephrine transporter (NET),citation needed and the resulting elevations in dopamine and norepinephrine are thought to contribute to its wake-promoting properties. Additional hypothesized contributions include indirect promotion of orexinergic and histaminergic activity alongside reduction of GABAergic tone.

Pharmacokinetics

Armodafinil is readily absorbed after oral administration,3 reaching peak plasma concentrations in approximately 2 hours in the fasted state.3 Food has minimal effect on overall bioavailability but may delay peak levels by 2 to 4 hours.3 The absolute oral bioavailability has not been determined due to the aqueous insolubility of armodafinil precluding intravenous administration.3 The terminal elimination half-life is approximately 15 hours.3 The primary metabolic pathway is hydrolytic deamidation, followed by sulfone formation catalyzed by CYP3A4/5.3 Additional routes include aromatic ring hydroxylation with subsequent glucuronide conjugation.3 Two metabolites reach appreciable plasma concentrations: R-modafinil acid and modafinil sulfone.3 Armodafinil moderately induces CYP3A4 and moderately inhibits CYP2C19.citation needed

Interactions

Dangerous

Highest risk

These combinations are considered extremely harmful and should always be avoided. Reactions to these drugs taken in combination are highly unpredictable and have a potential to cause death.

AlcoholDXMDissociativesHormonal birth controlMAOIsMDMAMXENBOMe compoundsStimulantsTramadol

Caution

Use caution

These combinations are not usually physically harmful, but may produce undesirable effects, such as physical discomfort or overstimulation. Extreme use may cause physical health issues. Synergistic effects may be unpredictable. Care should be taken when choosing to use this combination.

AbemaciclibAbrocitinibAcalabrutinibAcenocoumarolAcetaminophen
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Tolerance

Tolerance timelines are rules of thumb, not exact schedules, and vary widely between individuals and use patterns.

Full Tolerance
Repeated armodafinil use over time can make many effects less pronounced, leading users to need larger doses for similar results.
Baseline Reset
1-2 weeks
Half Tolerance
3-7 days
Cross Tolerance

Benzhydryl nootropics (modafinil, adrafinil)

Harm Potential

Addiction & Dependence

Psychological

Low

Armodafinil is considered mildly addictive with low abuse potential.citation needed Animal self-administration studies suggest some reinforcing properties, and it produces psychoactive and euphoric effects comparable to methylphenidate, though psychological dependence appears uncommon among users.

Toxicity

Dermatological

Serious skin reactions including Stevens-Johnson syndrome can develop in rare cases;4 these are hypersensitivity reactions requiring immediate medical attention if any rash develops.

Psychosis Risk

Hallucinations and mania are listed as possible side effects,4 particularly at overdose levels.citation needed These effects appear uncommon at typical therapeutic or recreational doses.

History & Culture

Armodafinil is the isolated R-enantiomer of the racemic wakefulness-promoting agent modafinil.citation needed It was developed by Cephalon Inc., a pharmaceutical company that later became a wholly owned subsidiary of Teva Pharmaceutical Industries Ltd. The compound received

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Legality

By Country

Illegal2
United States flagUnited StatesIllegal (analog/blanket ban)
Sweden flagSwedenIllegal
Prescription4
Australia flagAustraliaPrescription only
Brazil flagBrazilPrescription only
Germany flagGermanyPrescription-only (Anlage 1 AMVV)
Romania flagRomaniaRegulated (as modafinil enantiomer)
Not scheduled2
Canada flagCanadaNot scheduled
United Kingdom flagUnited KingdomNot scheduled

References

Source Pages

  1. Bluelight: Discussion – Is it possible to abuse armodafinil?
  2. Drug Users Bible by Dominic Milton Trott
  3. DrugBank
  4. DrugBank: Armodafinil (DB06208)
  5. Erowid: Armodafinil Experience Vault
  6. Isomer Design (TiHKAL/PiHKAL)
  7. PsychonautWiki
  8. TripSit Factsheets
  9. Wikipedia

Citations

  1. NUVIGIL (armodafinil) tablets, for oral use, C-IV — FDA Prescribing Information. DailyMed / U.S. National Library of Medicine (n.d.). https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=3dd49302-f757-d945-e063-6294a90afcba12
  2. Melinda Hersey, & Gianluigi Tanda. (2024). Pharmacological Advances in Central Nervous System Stimulants. 99, 287–326. https://doi.org/10.1016/bs.apha.2023.10.00612
  3. NUVIGIL (armodafinil) tablets, for oral use, C-IV — Full Prescribing Information. Cephalon, Inc. / FDA (n.d.). https://dailymed.nlm.nih.gov/dailymed/fda/fdaDrugXsl.cfm?setid=3dd49302-f757-d945-e063-6294a90afcba&type=display1234567891011121314
  4. NUVIGIL (armodafinil) Tablets - Full Prescribing Information (Revised 2/2025). Cephalon / Teva Pharmaceuticals (n.d.). https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=a69631d0-1263-769e-b232-4ab9160e0fa3123
  5. Therapeutic Goods (Poisons Standard—June 2026) Instrument 2026 (SUSMP No. 48; F2026L00633), Schedule 4. legislation.gov.au (n.d.). https://www.legislation.gov.au/F2026L00633/latest/text1
  6. Therapeutic Goods (Poisons Standard—June 2026) Instrument 2026 (SUSMP No. 48; F2026L00633), Schedule 4. legislation.gov.au (n.d.). https://www.legislation.gov.au/F2026L00633/asmade/2026-05-28/text/original/epub/OEBPS/document_1/document_1.html1
  7. Therapeutic Goods (Poisons Standard—June 2026) Instrument 2026 (SUSMP No. 48; F2026L00633), Schedule 4. tga.gov.au (n.d.). https://www.tga.gov.au/products/regulations-all-products/legislation-and-legislative-instruments/poisons-standard-susmp1
  8. Therapeutic Goods (Poisons Standard—June 2026) Instrument 2026 (SUSMP No. 48; F2026L00633), Schedule 4. tga.gov.au (n.d.). https://www.tga.gov.au/products/regulations-all-products/ingredients-and-scheduling-medicines-and-chemicals/scheduling-national-classification-system/scheduling-basics-medicines-and-chemicals-australia1
  9. Therapeutic Goods (Poisons Standard—June 2024) Instrument 2024. Therapeutic Goods Administration (TGA), Australian Government (2024). https://faolex.fao.org/docs/pdf/aus227554.pdf12
  10. Portaria SVS/MS nº 344, de 12 de maio de 1998, Anexo I, current consolidated text (Atualização nº 101), as amended by RDC Anvisa nº 1.036, de 9 de julho de 2026. gov.br (n.d.). https://www.gov.br/anvisa/pt-br/assuntos/medicamentos/controlados/lista-substancias1

Further Reading

  1. Darwish et al., Clinical Pharmacokinetics of Armodafinil, Clin Pharmacokinet 2009
  2. Drugs.com – Armodafinil Monograph
  3. Nuvigil (armodafinil) US Prescribing Information

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