Provigil, Modalert, Modvigil · Evidence-based safety and harm-reduction overview.
| Also known as | Provigil, Modalert, Modvigil |
| Category | Nootropic |
| controlled_status | Schedule IV US |
| approval_status | FDA-approved prescription only |
| primary_use | Narcolepsy, sleep apnea, shift work disorder |
| US legal status | Modafinil is an FDA-approved prescription medication and a Schedule IV controlled substance in the United States. A valid prescription is required, and importing or buying it without one is unlawful. |
Modafinil is a wakefulness-promoting agent (eugeroic) prescribed for excessive daytime sleepiness associated with narcolepsy, obstructive sleep apnea, and shift work disorder. Its exact mechanism is not fully understood but involves dopamine reuptake inhibition and effects on other neurotransmitter systems.
Research suggests modafinil inhibits dopamine reuptake, increasing dopamine availability in the brain, particularly in regions involved in wakefulness and attention. It also appears to act on noradrenaline and histamine systems. Unlike amphetamines, modafinil's mechanism is not fully characterized, and multiple receptor systems may contribute to its effects.
Modafinil was developed in France in the 1970s as Modiodal and was approved by the FDA in 1998 for narcolepsy. It has since become one of the most studied wake-promoting agents and is a common off-label medication for fatigue across various conditions.
Clinical trials support modafinil for reducing sleepiness in approved sleep disorders. Research suggests modest cognitive benefits in sleep-deprived individuals, while studies in well-rested healthy people report smaller and more inconsistent effects on attention and executive function. Long-term cognitive data in healthy users are limited.
In clinical trials for narcolepsy and sleep apnea, typical doses range from 100 to 400 mg daily. In sleep-deprivation studies, single doses of 100-300 mg have been used. Some research explores cognitive effects in healthy people at 100-200 mg, though responses vary significantly.
This is general research/context information, not medical advice or a recommended protocol.
Modafinil is sometimes combined with other compounds in anecdotal reports, but drug interaction data are limited. Any combination use should only occur under clinician supervision.
If you are going to research a compound, verifying identity and purity is the single most protective step. Independent analytical testing and sterile-handling supplies reduce risk.
Compare testing optionsNo. It is a Schedule IV controlled substance, and possessing or importing it without a valid prescription is unlawful.
We do not provide dosing guidance. Dosing must be determined by a licensed prescriber based on your individual health situation.
Yes. Research indicates it can reduce the effectiveness of hormonal contraceptives, so discuss backup methods with a clinician.
Typically peak effects occur 1-2 hours after oral administration, with duration of action approximately 12-15 hours.
Dependence has been reported, though less frequently than with older stimulants. Use should follow medical guidance and be reassessed periodically.
It is FDA-approved for shift work sleep disorder, but timing and individual tolerance vary. A clinician should manage its use for shift workers.
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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