modafinil price

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Instructions for use Modafinil



Other names: (RS)-2-[(Diphenylmethyl)sulfinyl]acetamid (IUPAC)

Bioavailability: varies

ATC-Code: N06BA07

Protein binding: ≥ 60%

Metabolism: Liver


Half-life: 15 hours

Excretion: Urine

CAS number: 68693-11-8

PubChem-CID: 4236

Drug Bank: DB00745

ChemSpider: 4088

KEGG: D01832

ECHA-InfoCard: 100.168.719

Formula: C15H15NO2S

Molar mass: 273,35 g·mol−1

How does it work?

Modafinil belongs to a class of drugs called stimulants that keep you awake. Like amphetamines, modafinil promotes alertness by stimulating the brain. Modafinil's exact mechanism of action is unknown. It is thought to increase the amount of dopamine in the brain by decreasing the reuptake of dopamine in nerves.

Modafinil helps against excessive daytime sleepiness in narcolepsy without causing serious side effects. The half-life is 10 to 12 hours.

How is it used?

Always take Modafinil exactly as your doctor has told you. Modafinil tablets should be swallowed whole with water.

The usual standard dose for adults is 200 mg per day. The daily dose can be taken all at once (in the morning) or divided into two doses per day (100 mg in the morning and 100 mg at noon). If necessary, the daily dose can be increased up to 400 mg by the doctor.

For elderly patients, as well as adult patients with serious kidney and liver diseases, the daily dose is 100 milligrams.

Side effects



sleep disorders

Dry mouth


Chest pain


Blurred vision

Warnings and Precautions

Be careful if you have heart disease

Dose adjustment is required if you suffer from kidney or liver disease.


Caution is advised if you have had alcohol or drug problems in the past

Other trade names

Modalert Modvigil Vigil

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Irregular heartbeat

Hypersensitivity to the ingredients

Untreated or insufficiently treated high blood pressure


Not safe


Alcohol consumption should be avoided

What happens if you miss the dose?

Do not take a double dose to make up for a forgotten dose. For the next dose, do not take more than the usual recommended amount.


If you take more of this medicine than you should, it could cause serious side effects.


There is a risk of serious interactions. Therefore, regular medical monitoring is required.

Unwanted reactions

Rotary vertigo

Severe flatulence

Speech disorders


Increased coughing


Food does not affect the effects of the drug.


This medicinal product does not require special storage conditions.

Frequently Asked Questions

What is Modafinil?

Modafinil is a prescription drug. It is approved by the EMA to treat excessive sleepiness associated with narcolepsy.

In what dosage can you buy Modafinil?

Modafinil can be bought as tablets in 2 dosages: 100 mg and 200 mg.

How long does Modafinil work?

The duration of effects of modafinil varies from patient to patient and can last up to 24 hours.

Can I Consume Alcohol While Taking Modafinil?

Avoid drinking alcohol while taking modafinil.

What is Modafinil?

Modafinil is a prescription drug used to treat excessive sleepiness caused by narcolepsy. By 2011, it was also approved throughout Britain for the treatment of excessive sleepiness in obstructive sleep apnea syndrome or chronic shift worker syndrome.

Off-label, this drug is used for chronic fatigue syndrome, ADHD, depression or eating disorders.

Modafinil was first developed in France in the early 1990s. When the patent expired in 2011, there are its generics on the market, such as Modalert, Modvigil, Vilafinil, etc.

Since Modafinil was first introduced, it has been one of the most commonly prescribed medications for excessive sleepiness associated with narcolepsy. The reason for this is the lack of serious side effects. For example, unlike amphetamines, modafinil does not cause a sympathomimetic effect and has a substantially low potential for abuse.

Modafinil is considered a well-tolerated drug. According to recent studies, however, it can lead to abuse and addiction. In addition, prolonged excessive sleepiness leads to stress reactions and compromises the immune system.

How and where to buy Modafinil?

In most European countries, modafinil requires a prescription. Britain, Austria and Switzerland are no exception. Here you will not find a classic pharmacy that sells modafinil without a prescription.

Modafinil is readily available over the internet without a prescription. However, online pharmacies located in non-prescription countries can sell modafinil over the counter to anyone who wants it.

Most modafil-containing medicines sold online are exported from India. This is explained by the fact that the laws regarding the sale of medicines in this country are very generous.

In which countries is modafinil available without a prescription?

In Britain, Austria, Switzerland, the USA and in many other countries you cannot buy modafinil without a prescription because it is subject to prescription. Adrafinil-containing drugs, on the other hand, are over-the-counter in some countries. Adrafinil is a prodrug that only becomes effective when it is metabolized to Modafinil.

What Side Effects Can Modafinil Cause?

Modafinil can cause mild or serious side effects. Common side effects include

  • Headache,
  • Nausea,
  • Fear,
  • Nervousness,
  • Sleep disorders,
  • Dizziness,
  • dry mouth,
  • loss of appetite,
  • Diarrhea,
  • runny nose,
  • Stomach, chest and back pain.

Skin rashes may occur during use. If this side effect occurs, treatment should be discontinued and a doctor consulted.

What are the long-term effects of Modafinil?

The drug should be taken sporadically. If this drug is used long-term, there is a risk of dependence. Tolerance to the active substance can also develop. For this reason, patients take an increased dose to achieve an effect.

To prevent the development of tolerance, the preparation should be taken once a week. This means that the body continues to react "sensitively" to the active substance. If modafinil needs to be taken more frequently for various reasons, it should not be used more than three times a week.

What is the difference between Armodafinil and Modafinil?

Armodafinil, sold under the brand name Nuvigil, is a newer drug compared to modafinil. It was approved in 2007 as the (R)-enantiomer of modafinil. The enantiomers are the molecules that are mirror images of each other (think of your left and right hands as examples). In this way, armodafinil has a slightly different chemical structure than modafinil.

Armodafinil may have a longer half-life compared to modafinil. In some cases, Armodafinil can be considered a stronger drug with better wakefulness effects. While both drugs can have the similar side effects, some side effects may be more common with one drug than the other.

The difference is also in the standard dose. While armodafinil should be taken in a daily dose of 150 mg, the daily dose of modafinil is 200 mg.

Modafinil comes in 100mg or 200mg tablet form. Armodafinil is also available as tablets. Available dosages are 50mg, 150mg, 200mg and 250mg.

Is Modafinil and Ritalin the Same?

No, these are two different drugs. Modafinil and Ritalin are popular central nervous system stimulants. Both Ritalin and Modafinil have similar effects in the brain, all of which help increase feelings of alertness.

In general, Ritalin is better for increasing dopamine levels, while Modafinil is better for stimulating alertness.

In terms of duration of action, modafinil effects last significantly longer than Ritalin effects.

Individual proofs :

  1. Robertson P, Jr, Hellriegel ET. Clinical pharmacokinetic profile of modafinil. Clin Pharmacokinet. 2003;42(2):123-137.
  2. Entry on Modafinil in Wikipedia
  3. Kumar R. Approved and investigational uses of modafinil: an evidence-based review. drug 2008;68(13):1803-1839
  4. : Modafinil 100mg tablets
  5. Michelle T Cao, Christian Guilleminault. Narcolepsy: Diagnosis and Management
  6. B. Boutrel, GF Koob, in Encyclopedia of Sleep, 2013. Basic Sleep Concepts, Science, Deprivation, and Mechanisms
  7. Volkow, ND, Fowler, JS, Wang, G, Ding, Y, & Gatley, SJ (2002). Mechanism of action of methylphenidate: insights from PET imaging studies. Journal of attention disorders, 6(1_suppl), 31-43.

modafinil price



1 Review(s)

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I've been taking modafinil for narcolepsy for 3 years as it works well for me. After taking it, I'm not tired at all and feel powerful. Sometimes I have diarrhea, which really bothers me. That's not good about Modafinil, but other than that it's a very good and effective drug!


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