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Modafinil (Provigil) vs Hydrafinil

Modafinil (Provigil) vs Hydrafinil Comparison, Similarities & Differences

Modafinil (Provigil)

Read full Modafinil (Provigil) Review


Read our Modafinil (Provigil) Review

Modafinil, commonly sold as Provigil, is considered one of the first groundbreaking eugeroic drugs to hit the market. It has been approved by the FDA for the treatment of various wakefulness disorders such as narcolepsy- a condition resulting in excessive daytime sleepiness, obstructive sleep apnea and shift work disorder. For those people without wakefulness disorders, this drug is often used on an off-label basis for cognitive enhancement by means of altering the CNS levels of histamine. Also, research has shown that it boosts working memory, but the long-term effects are relatively unknown.

Hydrafinil, also known as 9-Fluorenol, is under the eugeroic class of drugs or the wakefulness promoting drugs. It is a metabolite of Modafinil but is believed to be 39% more effective although their mechanism of actions are not the same. However in contrast with Modafiinil, Hydrafinil has a shorter half life having only 6 to 8 hours. According to studies, Hydrafinil has also been shown to enhance short-term visual memory, as well as improving attention and information processing. Also, it may decrease impulsitivity and increase your logical thinking.1


acetamide, Provigil, Modalert, Modapro, Alertex, 2-[Diphenylmethylsulfinyl]acetamide


The standard dosage consists of 200g/day
Daily Dosage # Stacks
200.00 mg 20
100.00 mg 9
50.00 mg 8
25.00 mg 6
1.00 mg 3
250.00 mg 2
300.00 mg 1

between 50-100mg.
Daily Dosage # Stacks
50.00 mg 2
59.00 mg 1
100.00 mg 1

Side Effects

Potential side effects include headache, insomnia, lack of appetite, hypertension, nervousness, dry mouth, nausea and vomiting.

Reports have shown that Hydrafinil have fewer and milder side effects compared to Modafinil.


Total Users

There are over 53 users currently taking this supplement.

There are over 6 users currently taking this supplement.


5.00/5 based on 2 user votes

4.00/5 based on 1 user votes

Evidence-Based Effects

  • Alertness - Increased
  • Attention - Increased
  • Blood Pressure - Increased
  • Cognition - Increased
  • Fatigue - Decreased
  • Memory - Increased
  • Reaction Time - Decreased
  • Working Memory - Increased
  • Motivation - Increased

Similar Comparisons

Compare Hydrafinil vs Fluorenol
Compare Hydrafinil vs Adrafinil


Duration # Stacks
1651 days 1

No data available

Medical Conditions

Medical Symptoms

No data available


Purpose # Stacks Effectiveness
Excessive daytime sleepiness (somnolence) 1
Can't tell
Apathy 1
Can't tell

No data available

Commonly Paired With

Commonly Paired With # Stacks
Alpha GPC 32
Noopept 28
L-Theanine 26
Phenylpiracetam 14
Fish Oil 13
Vitamin D 13

Commonly Paired With # Stacks
L-Theanine 6
Alpha GPC 5
Noopept 4
IDRA-21 4
Fish Oil 4
MCT Oil 3

Price & Brand

Editors RecommendationCertified Pick:
Modafinil (Provigil)

Buy Modafinil (Provigil) Supplement
Cost: $24.99
Explore 65 Modafinil (Provigil) Stacks

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Click Here To Buy Hydrafinil

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