The Complete Modafinil Dosage Guide

Today we will be discussing Modafinil dosage and the best way to use this supplement for optimum results, but first, let’s take a quick look at Modafinil basics for the sake of those who missed our compressive Modafinil review.

Modafinil is basically a wakefulness-promoting nootropic supplement originally designed to treat disorders such as narcolepsy and other related sleep disorders. It has however spread to other uses such as enhancing cognitive performance, improving memory and promoting mood stabilization.  The drug is sold under various brand names such as Modvigil, Provigil, and Modalert.

Modafinil Dosage Recommendations

Modafinil is typically sold in 100mg and 200mg tablets. The 200mg option is the most popular and widely available, which is also the most recommended dosage, taken once per day. The general recommended dosage range for this drug is between 100mg and 400mg per day.

New users, especially those simply seeking some cognitive enhancement are advised to start at even a lower dosage rate of 50mg per day and build up gradually. The idea behind this lower starting dosage is to help you achieve effectiveness with the lowest dose possible. This will also ensure that you get all the cognitive and mental enhancement benefits without any possibility of side effects or withdrawal symptoms.

If you find 50mg per day ineffective, increase to 100mg the next day and observe how you react to it. The 100mg per day dosage is also recommended for narcolepsy patients, which should be taken early in the morning. To experience alertness and focus throughout the day, consider taking 50mg in the morning and another 50mg around noon.

Most physicians, however, recommend a Modafinil dosage of 200mg per day, taken once when treating conditions such as circadian rhythm sleep disorders and such other sleep disorders. This is also the most common dose that students and entrepreneurs take to boost their cognitive functions and mental performance. But this should be taken in splits of 100mg each.

Some people have used higher doses of up to 400mg per day with the hope of getting intensified effects; however, clinical studies have revealed that there is no significant difference between taking 200mg and 400mg of Modafinil per day. So it might be a good idea to stick to 200mg and below to avoid any risks of side effects or withdrawal symptoms when you decide to get off the drug. It’s also advised not to take these supplement late in the evening as doing so may keep you awake for the better part of the night.


Possible Side Effects

Modafinil is generally safe, however, a few side effects have been reported in cases where individuals have used a significantly higher dose. Some of the reported Modafinil side effects include mild dizziness, nausea, anxiety, back pain, headaches, and diarrhea. In the event that any of these reactions occur, you are advised to lower your Modafinil dosage or temporarily discontinue its usage if the symptoms persist.

There are chances that Modafinil may not go down well with some other drugs when used together. So before taking Modafinil, it’s critical to let your physician know of any prescription drugs or herbal supplements that you are using at the moment.  More specifically, let your doctor know if you are using drugs that lower your blood pressure, or have anticoagulant properties.


Modafinil is a fairly easy to use nootropic supplement with no significant side effects when used within the recommended dosage range. Additionally, it kicks into action to offer its numerous benefits within just one hour of taking and you don’t have to worry about addiction or withdrawal symptoms commonly associated with some stimulants.  Finding the modafinil dosage “sweet spot” is fairly easy as this is a well tested drug.

Nicole Sanders

Hi, I'm Nicole, chief editor at Nootropics Revealed. Learn more about me and my mission here.