Phenibut For Sleep | What You MUST Know

You may have heard people are using Phenibut for sleep.

The nootropic supplement can act as a potent sleep aid to help you get that deep rest you’re looking for. Many have claimed it helps them with their insomnia — sometimes better than prescription medications.

But does it? What does the research say about using Phenibut for sleep?

That’s what we’ll go over in this article:

Everything you need to know about this powerful nootropic, and how it can help you get the beauty sleep you need for your body to build muscle, get ready for that big exam, and more.

We’ll cover the Phenibut dosage for sleep, how strong it is, Phenibut side effects, and so on.

This is not medical or legal advice. This guide is strictly for entertainment purposes only. Always consult a medical professional before consuming any nootropic and always abide by the laws of your country. Please read my disclaimer page, too.

What is Phenibut?

First, a quick crash course in brain biology. Understanding how Phenibut works — and how it doesn’t — will help you understand why it helps with sleep and how to use it properly.

Phenubut is basically a chain of amino acids that look to your body a lot like the neurochemicals your body makes naturally to send messages through the nervous system [1]. Specifically, it looks like γ-aminobutyric acid, also called GABA [2].

GABA slows down your nervous system.

GABA is one of the body’s most important nerurochemicals because it’s responsible for “depressing” your nervous system cells. When I say “depressing” I don’t mean making them feel sad. I mean reducing their activity. Stimulants, like caffeine, work by exciting your nervous system [3] — they get you amped up. Depressants are the opposite of stimulants, and they work by reducing the excitability of your nervous system.

If you’ve every had the jitters from coffee, you’ll know why sometimes it’s a good thing to have your nervous system relaxed a bit. Same with anxiety and stress: it can be really uncomfortable having your brain going a million miles a minute. Sometimes we need that little bit of something to slow it down.

Phenibut mimics GABA.

Because Phenibut looks like GABA, it can bind to a bunch of the same receptors and ultimately have the same effect: chilling your brain out [1].

It also increases some other neurochemicals, like dopamine and serotonin. That’s why Phenbiut’s effects include lowered anxiety, reduced self-consciousness, and yes, even sleep [4].


Phenibut Side Effects and Safety

Pheinbut may great for sleep, but is it safe?

Yes, Phenibut is safe.

It’s used as a prescription drug in several countries precisely because it’s effective and safe [1]. It’s also legal in most places, too, by the way.

But there are a few things you should know about the Phenibut side effects, the interaction it can have with other substances that depress the nervous system, and the potential for abuse. I have a big guide directly on this topic, but I want to make sure you know about the risks (even though their small) briefly here too.

Safety first!

Phenibut Side Effects

Phenibut side effects are generally not severe or common. Of course, you’re more likely to have issues if you are taking a lot of Phenibut. But if you’re taking normal amounts, most people won’t have any trouble.

P.S: Read more about how to find the perfect Phenibut dosage.

That said, like any prescription drug, there are some side effects that people have reported. These include [5, 6, 7]:

  • Drowsiness
  • Nausea
  • Irritability
  • Headache
  • Sedation
  • Itchiness (from allergies to Phenibut)
  • Rashes (from allergies)

More severe, and also much more rare, side effects can include [6]:

  • Motor incoordination
  • Hangover-like symptoms
  • Loss of balance

Obviously, some of those are expected. It’s a sleep aid… if “drowsiness” wasn’t listed as a side effect, you’d wonder what was up. Still, it’s good to know about those. Again, these are mostly avoidable if you simply don’t take too much.

Phenibut Interaction Effects

Phenibut can also interact with other substances. This is where the biology lesson earlier was helpful:

Since Phenibut works on the GABA pathways and depresses your nervous system, you want to be really careful with other substances that do the same thing.

Alcohol is a big one.

Alcohol is a potent depressant. The “drunk” feeling comes from alcohol reducing activity in the frontal cortex, which is responsible for planning, logic, and complex judgements. That’s why you text your ex when you get drunk, even though it’s a bad idea. It also depresses your motor cortex, which is why you end up having trouble walking and why you get slurred speech.

Phenibut is a depressant, but it works in a bit of a different way. It doesn’t affect your frontal or motor cortex in nearly the same way, so you don’t get the foggy or stumbly results that alcohol gives you.

But since both alcohol and Phenibut depress your nervous system, you really shouldn’t take them together. You should also avoid taking Phenibut if you’re on any other medications that work on the GABA pathway or are depressants. For example, stay away from pairing Phenibut with [1, 7, 8]:

  • Sedatives
  • Benzodiazepines
  • anticonvulsants
  • antipsychotics

Dependence and Withdrawal

Last, like alcohol, cannabis, and a million other substances, there is a potential for dependence on Phenibut [9, 10, 11]. That means your body can develop a tolerance to it, and you can feel like you need more and more of it.

I have a whole guide on Phenibut withdrawal and dependence, so check that out for details. But basically, don’t take too much of it or take it too often. Stick to 1 gram at a time and 2 grams a day as absolute maximums.

And make sure you’re taking Phenibut properly.

Phenibut HCL

Phenibut For Sleep | The Basics

If you follow all that guidance, you can use Phenibut safely to improve your sleep.

I can’t tell you how much Phenibut for sleep has helped me get to my best — it really works.

The best thing about Phenibut is that it’s not sleeping pills. It’s actually very weird how it works because taking Phenibut doesn’t make you tired until you’re actually in bed. I honestly often take it a few hours before I go out to party. It’s well-known as a social drug and even gives you a bit of a high. So it’s not like other things, like sleeping pills, that will make you directly tired.

Instead, it seems to enhance the feelings of sleepiness when you’re in bed and tired. My experience is that I can come home from a great night at the club and hit the sack at about 3:00 or 4:00 am… and then have the best sleep ever until 11:00 or even later. Then I get up feeling incredibly well-rested.

So, instead of making you tired directly, it feels like it does something closer to melatonin where it just gets your brain ready to sleep when you need it to. But even melatonin sometimes makes you feel drowsy.

Phenibut definitely enhances sleep, but it doesn’t necessarily make you tired when you take it. But it gets you ready for sleep when you are in bed. Try it, you’ll see what I mean.

Evidence of Phenibut for Sleep

But those are just my experiences…

What does the research say about how much Phenibut can help for sleep? Well, the majority of research on Phenibut that has been done by researchers is published in Russian, so it’s a bit hard to find a ton of studies that we can read. Still, there definitely is some evidence that it’s effective.

In one study of 62 patients with anxiety, researchers found that participants in the group receiving Phenibut had significant reductions in how much their sleep disorders bothered them [4].

They slept significantly better than normal.

In another published research report, Dr. Lapin reviews research in Russian about the effects of Phenibut and notes that it’s a powerful sleep aid [1]. Indeed, the title of his paper is “Phenibut: A powerful tranquilizer and nootropic drug” [1]. If you’re calling something a “tranquilizer”, it’s definitely going to help with sleep.

Other research has found Phenibut to be a useful sleep aid for patients with alcoholic abstinence syndrome [12] and patients with headaches [13]. It’s also been found to be effective for reducing fatigue and boosting energy levels [14, 15].

Phenibut Dosage For Sleep

Okay great, so what’s the best Phenibut dose for sleep?

Here’s what I do and it seems to work really well. Beginners can probably take even less:

  • 500mg to 750mg
  • split into 1 to 3 doses throughout the day, mainly in the evening
  • an hour before food or 2 to 3 hours after food — basically on an empty stomach

This Phenibut dose for sleep usually provides me with a clear but relaxed and focused state where I can really get a lot done. And then, hours later, when I go to bed, I notice I have a very deep and restful sleep. When I wake up, I feel very refreshed and well-rested.

Phenibut Micro-Dosing For Sleep

There’s also some people that do Phenibut micro-dosing for better sleep. They say that it helps them feel just a bit more relaxed and able to get comfortable so that they can fall asleep faster.

To take a micro Phenibut dosage for sleep, try the following:

  • 50/100mg up to 250mg,
  • in 1 dose
  • an hour before food or 2 to 3 hours after food
  • an hour and a half before bed


Understanding the Phenibut Half-Life

The Phenibut half-life is actually quite long. Research suggests that it’s about 5.3 hours. That means it takes over 5 hours for your 500mg dose to reduce to about 250mg.

The result of this long half-life is that the effects of Phenibut last quite a long time.

This is actually a really good thing for sleep because it means that when you take it in the morning or before dinner, you’re still going to get the good sleep effects when you go to bed that night.

And while the Phenibut “high” lasts about 4 hours, the afterglow effects can mean that it hangs around for up to 24 hours. That means you’ll get at least one good sleep out of it, and maybe even two.

Properly Timing Your Phenibut Dosage

Considering that timing, here’s how you can get the most out of Pheinbut for sleep:

  • Take your Phenibut dose for sleep about 2 hours before bed
  • You’ll start to feel it kick in just before you go to bed
  • You may notice the afterglow lasting throughout the next day

Where to Buy Phenibut Online | 2020 Guide

Ready to try it out? Here’s some guidance for how you can buy Phenibut online:

It’s difficult to find Phenibut in regular stores or pharmacies, but it’s pretty easy to find online.

Just be careful when you’re choosing your online vendor because some people are sketchy. Phenibut is produced all over the world and you can bet that not everyone has the same respect for purity that you do. And since it’s not regulated as a drug, there’s not the tight quality controls you might like.

So that just means find a vendor with a good reputation. I always use LiftMode as my go-to. That’s partly because my own personal experience with them has been great every time, and I’ve never heard of any bad experiences with them.

But they also have a good set of policies to make sure you get what you asked for and that can protect you in case there’s an issue:

  • They’ve got good prices. Phenibut is not expensive, so don’t buy from someone who is pretending that it is. LiftMode’s got among the best prices.
  • Their product is pure and they’ve got lab results posted on their website to prove it. They get a new one each year.
  • They have a reasonable return policy that they make good on if there is an issue.
  • They accept a number of payment options including credit cards, a number of cryptocurrencies like bitcoin, and eCheck.

I’ve tried other vendors, and this is the best one I’ve found. Highly recommended.

Phenibut For Sleep | Verdict

One of the greatest things about Phenibut is the great sleep you get from it.

It’s way better than alcohol: when you’re drunk you wake up late and feel awful. With Phenibut, you don’t get sleepy just from taking it, but you get amazingly restful sleep.

Highly recommended.

Obviously, start with a low Phenibut dose for sleep to avoid any potential side effects. And remember that there is a potential for dependence, so you really don’t want to be using Phenibut for sleep every night. It should be used 1 or 2 days a week, maximum.

But if you do those things, Phenibut could be a great way to get you the rest you need before a big exam, presentation, or another important event!


  1. Lapin I. (2001). Phenibut (beta-phenyl-GABA): a tranquilizer and nootropic drug. CNS drug reviews, 7(4), 471–481. doi:10.1111/j.1527-3458.2001.tb00211.x
  2. Dambrova, M., Zvejniece, L., Liepinsh, E., Cirule, H., Zharkova, O., Veinberg, G., & Kalvinsh, I. (2008). Comparative pharmacological activity of optical isomers of phenibut. European journal of pharmacology, 583(1), 128-134.
  3. Fisone, G., Borgkvist, A., & Usiello, A. (2004). Caffeine as a psychomotor stimulant: Mechanism of action. Cellular and Molecular Life Sciences CMLS, 61(7-8), 857-872.
  4. Vorob’eva, O. V., & Rusaya, V. V. (2016). Pharmacotherapy of anxiety disorders in patients with chronic cerebral ischemia. Zhurnal nevrologii i psikhiatrii imeni SS Korsakova, 116(12. Vyp. 2), 49.
  5. Cheung, J. & Penn, J. (2018). Weekly dose: Phenibut. The Conversation.
  6. Ozon Pharm (n.d.), Fenibut (PDF). [In Russian].
  7. O’Connell, C. W., Schneir, A. B., Hwang, J. Q., & Cantrell, F. L. (2014). Phenibut, the appearance of another potentially dangerous product in the United States. The American Journal of Medicine, 127(8), e3-e4.
  8. Davies, M. (2003). The role of GABAA receptors in mediating the effects of alcohol in the central nervous system. Journal of psychiatry & neuroscience.
  9. Högberg, L., Szabó, I., & Ruusa, J. (2013). Psychotic symptoms during phenibut (beta-phenyl-gamma-aminobutyric acid) withdrawal. Journal of Substance Use, 18(4), 335-338.
  10. Zheng, K. H., Khan, A., & Espiridion, E. D. (2019). Phenibut Addiction in a Patient with Substance Use Disorder. Cureus, 11(7).
  11. Samokhvalov, A. V., Paton-Gay, C. L., Balchand, K., & Rehm, J. (2013). Phenibut dependence. Case Reports, 2013, bcr2012008381.
  12. Danilin, V. P., Krylov, E. N., AIu, M., & Rait, M. L. (1986). Effect of fenibut on the nocturnal sleep of patients with the alcoholic abstinence syndrome. Zhurnal nevropatologii i psikhiatrii imeni SS Korsakova (Moscow, Russia: 1952), 86(2), 251-254.
  13. Shypilova, E. M., Zavadenko, N. N., & Nesterovskiy, Y. E. (2017). Preventive treatment of tension headache in children and adolescents. Zhurnal nevrologii i psikhiatrii imeni SS Korsakova, 117(7), 36-42.
  14. Vorob’eva, O. V., & Rusaya, V. V. (2017). Efficacy and safety of noophen in the treatment of chronic fatigue syndrome in patients with cerebrovascular insufficiency. Zhurnal Nevrologii i Psikhiatrii Imeni SS Korsakova, 117(11), 31-36.
  15. Chutko, L. S., Surushkina, S. I., Nikishena, I. S., Iakovenko, E. A., Anisimova, T. I., Bondarchuk, I. L., & Sergeev, A. V. (2014). Asthenic disorders in children and their differentiated treatment. Zhurnal Nevrologii i Psikhiatrii Imeni SS Korsakova, 114(12), 99-103.


After utilizing nootropics for the better part of a decade, I realized the potent results these products produce -- with regards to productivity and cognitive enhancement. Soon thereafter, I became obsessed with finding the premier smart drugs on the market. Then using them to improve my life. When I'm not devouring everything I can about nootropics and the science behind why they work, you'll find me traveling around the world or in the gym.

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