Nuvigil, Waklert, Artvigil · Evidence-based safety and harm-reduction overview.
| Also known as | Nuvigil, Waklert, Artvigil |
| Category | Nootropic |
| controlled_status | Schedule IV US |
| approval_status | FDA-approved prescription only |
| primary_use | Narcolepsy, sleep apnea, shift work disorder |
| half_life_approx | 13-15 hours |
| US legal status | Armodafinil is an FDA-approved prescription medication and a Schedule IV controlled substance in the United States. It requires a valid prescription, and buying or importing it without one is unlawful. |
Armodafinil is the longer-acting R-enantiomer of modafinil, marketed as a wakefulness-promoting agent for narcolepsy, obstructive sleep apnea, and shift work disorder. It shares modafinil's general pharmacology with a somewhat different plasma concentration profile.
As the active R-enantiomer of modafinil, armodafinil works through dopamine reuptake inhibition and effects on adrenergic and histamine systems. Its primary difference from racemic modafinil is pharmacokinetic: it reaches higher peak concentrations and maintains elevated levels longer, potentially extending wakefulness duration.
Armodafinil was developed as a more selective formulation of modafinil and was FDA-approved as Nuvigil in 2007. It was marketed as offering longer duration and potentially better sustained effects, though clinical equivalence to modafinil remains debated.
Clinical trials support armodafinil for reducing excessive sleepiness in its approved indications. Research suggests effects broadly similar to modafinil, with studies reporting it may sustain plasma levels later in the day. Evidence for cognitive enhancement in healthy, well-rested people remains limited and mixed.
In clinical trials, typical doses for armodafinil range from 150 to 250 mg daily, generally lower than modafinil doses due to its longer half-life. Studies comparing it directly to modafinil often use 150 mg armodafinil as equivalent to 200 mg modafinil.
This is general research/context information, not medical advice or a recommended protocol.
Armodafinil may be combined with other agents in some contexts, but pharmacokinetic interactions are not well characterized. Medical supervision is essential for any combination use.
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Compare testing optionsArmodafinil is the single R-enantiomer of modafinil and tends to maintain blood levels later in the day, but their effects and risks are broadly similar.
No. It is a Schedule IV controlled substance requiring a valid prescription in the US.
We do not offer dosing advice. Only a licensed prescriber can determine appropriate dosing for you.
Research suggests armodafinil may maintain effective blood levels longer, with potential for extended wakefulness, but individual responses vary.
The side effect profiles are similar; some users report fewer afternoon side effects with armodafinil due to its longer half-life.
Brand Nuvigil is typically more expensive, though generic armodafinil may cost less and varies by pharmacy and insurance.
Medical & legal disclaimer. This site is for informational and harm-reduction purposes only. It is not medical advice and is not a substitute for a licensed healthcare professional. The compounds discussed are largely not approved by the FDA for human use and many are sold strictly as research chemicals 'not for human consumption.' Nothing here is an endorsement to purchase, possess, or use any substance. Laws vary by jurisdiction. Always consult a qualified physician and follow the law where you live.
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