|Summary sheet: Modafinil|
|Common names||Modafinil, Alertec, Modavigil, Modiodal, Provigil, Modalert|
|Routes of Administration|
Modafinil (also known by the brand names Provigil, Alertec, Modavigil, among others) is a eugeroic substance of the benzhydryl class that produces wakefulness-promoting and stimulant effects when administered. It is commonly used to enhance cognition, reduce fatigue, and increase alertness in both medical and non-medical contexts.
Modafinil is approved by the U.S. Food and Drug Administration for the treatment of obstructive sleep apnea, shift work sleep disorder and narcolepsy. However, studies have shown that modafinil may also be useful off-label for alleviating the symptoms of depression,, bipolar disorder, Parkinson's disease, seasonal depressive disorder, ADHD, and various other conditions which have fatigue as a symptom.
Modafinil has also been used as a doping agent by various athletes due to its ability to produce physical stimulation. It has recently gained mainstream popularity for its use as a "smart drug" to improve memory, counteract the desire or need for sleep, and increase general productivity.
Modafinil is a synthetic molecule of the benzhydryl class. Benzhydryl compounds are comprised of two benzene rings attached to a single carbon molecule. Modafinil is classified as a sulphinyl benzhydryl molecule, as it also contains a sulphinyl group, a sulphur molecule double-bonded to an oxygen molecule, attached to the carbon of the benzhydryl group. From this sulphur group at R2, an acetamide group is bound at its free carbon through a carbonyl group to a terminal amine group. Modafinil is structurally analogous to fluorafinil, another benzhydryl stimulant.
While modafinil is a racemic mixture, a similar medication, armodafinil, consists of only the (−)-(R)-enantiomer of modafinil.
Although the exact mechanisms by which modafinil and its R-enantiomer, armodafinil, decrease sleepiness are not fully understood, evidence suggests that these agents promote wakefulness by acting directly or indirectly on many components of the sleep / wake circuit. Modafinil and armodafinil are hypothesized to inhibit GABA and promote dopamine, norepinephrine, histamine, and hypocretin / orexin.
Modafinil and its R-enantiomer, armodafinil, increase both norepinephrine (NE) and dopamine (DA), possibly via their blockade of both the NE and DA reuptake transporters (NET and DAT, respectively). The actions of NE at alpha-adrenergic receptors and DA at dopamine D2 receptors are thought to contribute to the wake-promoting properties of modafinil. Orexin is a key component of the arousal system; thus, the hypothesized action of modafinil on the orexinergic system may help increase alertness. Additionally, modafinil may indirectly increase histamine, either by reducing GABAergic inhibition of histaminergic neurons or via actions at orexinergic neurons. The increase in histamine may contribute to both the wake-promoting effects of modafinil as well as the potential of modafinil to increase alertness.
In genetically engineered mice lacking the dopamine transporter (DAT), modafinil lacked wake-promoting activity, suggesting that this activity was DAT-dependent. However, the wake-promoting effects of modafinil, unlike those of amphetamine, were not reduced by the dopamine receptor antagonist haloperidol in rats. In addition, alpha-methyl-p-tyrosine, an inhibitor of dopamine synthesis, blocks the action of amphetamine but does not block locomotor activity induced by modafinil.
In comparison to traditional stimulants such as amphetamine, methylphenidate or cocaine, this compound induces an experience which is far less forceful, euphoric, and recreational. It instead emphasizes general wakefulness and motivation enhancement.
The effects listed below are based upon the subjective effects index and personal experiences of PsychonautWiki contributors. The listed effects should be taken with a grain of salt and will rarely (if ever) occur all at once, but heavier doses will increase the chances and are more likely to induce a full range of effects. Likewise, adverse effects become much more likely on higher doses and may include serious injury or death.
- Stimulation - In terms of its effects on the user's physical energy levels, modafinil is commonly considered to be stimulating and energetic, but can be considered as much less stimulating when compared to amphetamine. This stimulation encourages physical movement and activities such as running, playing sports, socializing, and/or exercising. The particular style of stimulation which modafinil presents can result in jaw clenching, teeth grinding, or other involuntary movements comparable to that of traditional stimulants at high doses, but are manifested much less consistently and intensely when compared to amphetamine or cocaine.
- Increased heart rate
- Appetite suppression - The above components are also accompanied by a suppression of appetite which is usually less intense in strength in comparison to the appetite suppression experienced with amphetamine.
- Dehydration - Dehydration and dry mouth commonly occur due to an increase in motivation to engage in physical activities as well as an increased sense of focus which causes one to forget to drink water.
- Headaches - In terms of physical discomfort, modafinil can cause headaches especially if dehydrated, if you have not eaten food, or if you have been sitting in an awkward position for an extended period of time focused intensely on a task.
- Body odor alteration - Modafinil can leave a very distinct smell of sulfur in one's urine. This is likely because modafinil, being a member of the sulphinyl benzhydryl chemical class, contains sulfur in its chemical makeup.
- Pupil dilation
- Photophobia - Although uncommon, modafinil can cause a temporary visual intolerance to light.
- Focus enhancement
- Thought acceleration
- Memory enhancement
- Motivation enhancement
- Time distortion
- Emotion enhancement or Emotion suppression
- Increased music appreciation - While modafinil is capable of producing this effect, it does not do so as reliably as it does with traditional stimulants or entactogens.
Toxicity and harm potential
The long-term safety and effectiveness of modafinil as a drug of regular usage have not been determined.
Anecdotal reports from people who have tried modafinil suggest that there do not seem to be any negative health effects attributed to simply trying this substance at low to moderate doses by itself or using it sparingly (but nothing can be completely guaranteed).
It is worth noting that as this compound is a commonly prescribed pharmaceutical, it is considerably less likely to have unpredictable adverse health effects than the typical research chemical. Nevertheless, it is strongly recommended that one use harm reduction practices if using this substance.
The median lethal dose at which 50% of participants die (LD50) from modafinil for human beings has never been reached. No life-threatening effects have taken place in clinical trials involving the administration of 1000mg to 1600mg of modafinil per day for 7 to 21 consecutive days. Intentional acute overdoses of 4500mg and 4000mg in two adult subjects and an accidental ingestion of 800mg by a three-year-old child did not result in any life-threatening effects or death. After overdosing on 5000mg of modafinil in a suicide attempt, a fifteen-year-old female reported a severe headache, nausea, and tachycardia, but did not appear to have any lethal or long-term effects.
Tolerance and addiction potential
The chronic use of modafinil can be considered as not addictive with a low potential for abuse. It does not seem to be capable of causing psychological dependence among most users.
Tolerance to many of the effects of modafinil develops with prolonged and repeated use. This results in users having to administer increasingly large doses to achieve the same effects. After that, it takes about 3 - 7 days for the tolerance to be reduced to half and 1 - 2 weeks to be back at baseline (in the absence of further consumption). Modafinil may present a cross-tolerance with all benzhydryl nootropics, meaning that after the consumption of modafinil, all related eugeroic compounds such as armodafinil and adrafinil will display a reduced effect.
Although many psychoactive substances are safe on their own, they can become dangerous and even life-threatening when combined with other substances. The list below contains some common potentially dangerous combinations, but may not include all of them. Certain combinations may be safe in low doses of each but still increase the potential risk of death. Independent research should always be done to ensure that a combination of two or more substances is safe before consumption.
- 25x-NBOMe - Both the NBOMe series and this compound induce powerful stimulation and their interaction may cause severe side effects. These can include thought loops, seizures, increased blood pressure, vasoconstriction, increased heart rate, and heart failure (in extreme cases).
- Alcohol - It is dangerous to combine alcohol, a depressant, with stimulants due to the risk of excessive intoxication. Stimulants decrease the sedative effect of alcohol which is the main factor most people consider when determining their level of intoxication. Once the stimulant wears off, the effects of alcohol will be significantly increased, leading to intensified disinhibition as well as respiratory depression. If combined, one should strictly limit themselves to only drinking a certain amount of alcohol per hour.
- DXM - This combination may cause increased heart rate and panic attacks.
- MXE - Increased heart rate and blood pressure may occur.
- Tramadol - This combination can increase the risk of seizures.
- MAOIs - This combination may increase the amount of neurotransmitters such as dopamine to dangerous or even fatal levels. Examples include syrian rue, banisteriopsis caapi, 2C-T-2, 2C-T-7, αMT, and some antidepressants.
- MDMA - The neurotoxic effects of MDMA may be increased when combined with other stimulants.
- Hormonal Birth Control - Modafinil reduces the effectiveness of hormonal birth control for up to a month after use by increasing the activity of the enzyme CYP3A4/5. Notably, the same enzyme is inhibited by grapefruit juice.
This legality section is a stub.
As such, it may contain incomplete or wrong information. You can help by expanding it.
Modafinil is legally approved for medical purposes worldwide. However, it is illegal to sell and possess in most countries without a prescription.
- Canada: Modafinil is listed as a Schedule F prescription drug in Canada and it can be prescribed for human and veterinary use.
- Russian Federation: Modafinil is classed as a Schedule II substance. 
- United Kingdom: Modafinil is a licensed prescription-only medicine (POM) in the United Kingdom. It is not a criminal offence to possess this medicine without a valid prescription. This medicine can legally be obtained with a valid prescription or through legal import of the medicine for personal use as outlined in Section 13 of the Medicines Act 1968.
- United States: In the United States, modafinil is a Schedule IV controlled substance. It is illegal to buy, sell, or possess the drug without a prescription or DEA license.
- Provigal (Manufacturer's Website) | http://www.provigil.com/
- Modafinil augmentation of selective serotonin reuptake inhibitor therapy in MDD partial responders with persistent fatigue and sleepiness (PubMed.gov / NCBI) | http://www.ncbi.nlm.nih.gov/pubmed/17729016
- A placebo-controlled evaluation of adjunctive modafinil in the treatment of bipolar depression (PubMed.gov / NCBI) | http://www.ncbi.nlm.nih.gov/pubmed/17671288
- Neuroprotective effects of modafinil in a marmoset Parkinson model: behavioral and neurochemical aspects (PubMed.gov / NCBI) | http://www.ncbi.nlm.nih.gov/pubmed/16940766
- PubMed - Modafinil treatment in patients with seasonal affective disorder/winter depression: an open-label pilot study (PubMed.gov / NCBI) | http://www.ncbi.nlm.nih.gov/pubmed/15306145
- Modafinil improves symptoms of attention-deficit/hyperactivity disorder across subtypes in children and adolescents (PubMed.gov / NCBI) | http://www.ncbi.nlm.nih.gov/pubmed/18280848
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- Journal of Clinical Sleep Medicine - Unsuccessful Suicide Attempt of a 15 Year Old Adolescent with Ingestion of 5000 mg Modafinil http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2725258
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- Placement of Modafinil Into Schedule IV - U.S. Department of Justice | http://www.deadiversion.usdoj.gov/fed_regs/rules/1999/fr0127.htm