What Is The Ideal Modafinil Dosage?

Modafinil has been used by many people as a weight loss aid, smart drug, a medication for managing ADHD and as a wakefulness promoting agent. The benefits of this drug are hard to resist especially if you want to better your life.

One of the key questions many first time users ask is what the recommended dosage is. Is it 100mg, 200mg or 400mg per day? Knowing the right dosage is important to you as it will help prevent some of the accompanying side effects. (Taking Modafinil for the first time? Read this.)

In this article, I will discuss the recommended dosage of Modafinil that will help you achieve optimal focus and concentration. But before we go into deeper details about dosage information, let’s first understand how this drug works.

How Modafinil Works

The working mechanism of this nootropic drug is still somewhat of a mystery. Inconclusive studies indicate that it works by changing brain chemicals that are responsible for sleep and the circadian rhythm of the body. It also works by increasing the number of neurotransmitters that are associated with reward.

How to Take Modafinil

Modafinil comes in tablet form whose main objective is to enhance cognitive function during the day while improving sleep at night. These tablets should be taken orally. Common brand names for this drug are Provigil and Alertec. Regardless of the brand name you are using, the recommended dosage should be taken once a day before or after meals.

If the recommended dosage is 2 tablets per day, they should be ingested at the same time of each day. The time this drug is taken daily should not be changed without approval from a qualified medical practitioner. However, if you are consuming it for non-medical purposes, your physician will tell you to consume it on “as needed” basis.

Modafinil is one of the prescription medications that have the potential of forming a habit. However, this is unlikely unless you exceed the recommended dosage.

50mg Dose

If you plan to use this prescription medication to improve cognitive function such as mental alertness, focus or concentration, it is recommended you start with a small dosage and increase it gradually with time. Asa starter, a small dose of around 50mg will be enough to help you achieve the desired result and reduce the likelihood of getting side effects. If a 50mg dose is not giving you the results you want, you can increase it gradually until you find the right dosage.

It is not easy to find Modafinil 50mg dose when ordering online. One of the tricks that many people use when they want to control intake is that they purchase a generic form of Modafinil such as Modvigil or Modalert and break the tablets.

100mg Dose

Narcolepsy is a condition characterized by an extreme tendency to fall asleep whenever one is in a relaxing environment. If you are a candidate for this condition, the recommended dosage is 100mg taken once a day immediately you wake up. Modafinil 100mg dose is also recommended for mental enhancement.

You can decide to take the entire amount immediately you wake up or consume 50mg in the morning and another 50mg in the afternoon. The splitting of doses will help you know which one or which time works best for you. It is easier to order Modafinil 100mg dose online. Brand names such as Alertec and Provigil are available in 100mg and 200mg options.

200mg Dose

The recommended dose for treating circadian rhythm sleep disorders is 200mg once a day before or after a meal. Modafinil 200mg dose is also preferred by students and entrepreneurs who want to achieve their cognitive enhancement goals. As stated earlier, it is advisable you start with a small dose to see how your body reacts before you increase to 200mg.

200mg dose seems to be the preferred dose for the majority of users who wants to improve their concentration, focus and increase productivity. Ordering it online is not a problem since many brands come in 100mg or 200mg.

400mg Dose

A split dose of 400mg of Modafinil is recommended if you want to sustain wakefulness throughout the entire waking day. However, this amount is recommended if you are experiencing insufficient response to the initial 100mg or 200mg Modafinil dose.

Multicenter, randomized, double-blind studies show that there are no significant differences in the side effects of a 200mg dose and a 400mg dose. These two doses are well tolerated by patients so there is no need to worry about side effects.

ADHD Dosage

Modafinil’s off-label use accounts for around 90% of its sales. Some of these uses include the treatment of ADHD, psychiatric and neurodegenerative disorders. Although the treatment of ADHD has yet to be approved by FDA, inconclusive studies show a lot of positive feedback on the drug’s effectiveness.

The recommended dosage for treating ADHD for adults ranges from 100mg to 200mg per day depending on the extent of the condition. Early clinical trials show that there are side effects of this drug in children so even a low dosage is not recommended for children.


A good rule of thumb is to consult a medical care practitioner before taking any amount of Modafinil. If you have a medical condition such as liver problems, it is also advisable to consult your doctor first to be on the safe side.

Some side effects may be experienced when high doses are taken. These side effects include sleep disturbances, palpitations, insomnia, confusion, tremors, agitation, aggressiveness, excitation, and irritability. Do not exceed the recommended dosage which is 400mg per day. Make sure to take the recommended dosage to prevent these side effects from occurring.

If you are planning to take Modafinil to counter excessive drowsiness as a result of irregular schedule, a condition known as shift work sleep disorder, you should take it about one to three hours before the shift begins.

Although Modafinil is used to combat sleepiness, it should not be used for the treatment of sleep disorders. You should try natural means such as regular exercises to resolve any sleep disorders.

Also, avoid alcoholic beverages and other prescription medication while taking Modafinil. These two may interact with this drug to cause some serious side effects in the body.

This medication should be stored away from children at 68 to 77 Fahrenheit (20 to 25 degrees Celsius).


1. http://www.ncbi.nlm.nih.gov/pubmed/14520165
2. https://www.drugs.com/dosage/modafinil.html
3. http://trackmystack.com/articles/modafinil-dosages/
4. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2679862/

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Paulo César Segatti - May 2, 2018

O medicamento é bom desde que seja tomado na posologia certa! Até por que a diferença entre o remédio e o veneno é a dose!Ele também aumenta a libido se tomado em grandes doses!


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