Table of Contents
Key Takeaways
- Phenibut is a GABA analogue that increases GABA levels in the brain, providing stress relief and reducing anxiety.
- It has been used in the treatment of neurological disorders such as PTSD, anxiety, depression, insomnia, and alcoholism.
- By raising GABA levels, Phenibut helps balance mood, promotes focus, relaxation, and positive mood, and counteracts irritability and restlessness.
- Phenibut should be used cautiously due to potential dependency, withdrawal symptoms, and adverse side effects.
- Phenibut dosage should start low at 200 – 300 mg per day, avoid alcohol or benzodiazepines, and purchase from reliable sources.
- In a hurry – click here to learn more about and buy Phenibut here: Cosmic Nootropic – Phenibut
Phenibut (β-Phenyl-GABA, β-phenyl-γ-aminobutyric acid, Noofen, Citrocard) is an analogue of the inhibitory neurotransmitter GABA. The addition of a phenyl ring allows Phenibut to cross the blood-brain barrier (BBB). Neurohackers prefer Phenibut when the goal is to raise GABA levels in the brain because GABA as dietary supplement cannot cross the BBB.
Phenibut was developed in St. Petersburg, Russia in 1963. And it has since been used as a pharmaceutical used to treat PTSD, anxiety, depression, insomnia, alcoholism and other neurological disorders.
GABA’s role is to keep glutamate, the primary excitatory neurotransmitter, from overwhelming you. Too much glutamate can cause a seizure, and too little (or too much) GABA can put you in a coma. A healthy brain maintains a critical balance of GABA and glutamate within the central nervous system.
GABA acts like a “brake” on neuron circuits during stress. Low GABA levels can result in anxiety, insomnia, poor mood and restlessness.
Clinical studies show that boosting GABA with a supplement like Phenibut relieves anxiety, stress, and boosts the production of alpha brain waves.[i] If GABA is optimized in your brain you’ll feel focused, relaxed and stress-free.
Phenibut helps:
- Balance mood. Phenibut has an inhibitory effect on overly stimulated neurons because it raises GABA levels in your brain. Low GABA levels lead to anxiety, depression and insomnia. GABA helps restore that balance. Promoting a more positive mood which improves focus and relaxation.[ii]
- Boost Human Growth Hormone. Bodybuilders and athletes use Phenibut before resistance training. Studies show by raising GABA levels, you can boost blood levels of Human Growth Hormone.[iii] Promoting greater recovery support and lean muscle growth.
- Neurotransmitters. Phenibut stimulates dopamine receptors, and antagonizes beta-phenethylamine (PEA).[iv] Dopamine aids in memory formation, attention, focus, and cognition. PEA increases the action of dopamine, norepinephrine, acetylcholine and serotonin. It’s partly behind the overstimulation that causes irritability, restlessness, and agitation that could be caused by too much dopamine and norepinephrine. Phenibut can counteract this affect giving you a cognition boost without the negatives.[v]
Overview
Phenibut (β-Phenyl-GABA, β-phenyl-γ-aminobutyric acid, Noofen, Citrocard) is derived from the inhibitory neurotransmitter GABA. The addition of a phenyl ring allows Phenibut to cross the blood-brain barrier. And the reason why neurohackers prefer Phenibut when the goal is to raise GABA levels in the brain.
GABA (gamma-aminobutyric acid) is the major inhibitory or relaxing neurotransmitter in your brain.[vi] GABA’s primary role is to keep the major excitatory neurotransmitter glutamate in check.
GABA is naturally synthesized in your brain from glutamate. It’s estimated that 40% of the synapses in the human brain work with GABA and therefore have GABA receptors.
So when using Phenibut to boost GABA, you enhance normal sleep cycles, and improve blood pressure. GABA even stimulates the pituitary gland to secrete Human Growth Hormone. And helps produce endorphins that make you feel good after a workout or sex.
Soon after Phenibut was discovered in St. Petersburg, Russia, it was being prescribed by doctors to lower stress and anxiety, treat PTSD and insomnia.
Phenibut was included in the medical kit for Russian astronauts on the Soyuz-19 and Salyut-4 missions as a ‘tranquilizer’.[vii] Because Russian scientists found that Phenibut is one of the only tranquilizer and nootropic drug options that lowers stress levels without negatively affecting performance.
As a nootropic, when you use Phenibut to normalize GABA levels you’ll experience a reduction in anxiety, insomnia, nervousness, restlessness and stress.
Phenibut can be a more natural, safer alternative to Benzodiazepine drugs like Valium and Xanax. These pharmaceuticals work by increasing GABA receptor sensitivity.[viii]
How does Phenibut work in the Brain?
Phenibut helps brain health and function in several ways. But two in particular stand out.
- Phenibut boosts GABA in the brain. Phenibut is a derivative of GABA. And easily crosses the blood-brain barrier. GABA on its own cannot cross this barrier unless paired with a dedicated carrier.[ix]
GABA works by preventing neural signaling associated with anxiety from reaching other neurons. It does this by attaching to the receptors that would otherwise excite those neurons. Over-stimulating neurons in certain areas of your brain is what causes anxiety-related symptoms.
The majority of studies on Phenibut have been conducted in Russia. And most studies have been done with animals. In this study using rabbits, scientists looked at anxiety behaviors and how they were effected by Phenibut.
They exposed the rabbits to emotional stimuli causing anxiety in the animals. Anxiety caused the rabbits to ‘freeze’ and exhibit defensive reactions. Behaviors very similar to what happens in humans when they’re under stress.
When the rabbits were administered Phenibut, the anxiety-caused reactions of defensiveness and passive reactions (freezing) decreased to normal behavior.[x]
- GABA changes brain waves. Using Phenibut as a nootropic helps increase GABA levels in your brain. And we know that GABA helps decrease Beta brain waves and increase Alpha brain waves.[xi]
Beta brain waves are important for attention, alertness, concentration and developing memories. But excess levels of concentration, particularly during stress, can lead to anxiety, depression, insomnia and more stress.
When you are in an alert state, both Alpha and Beta brain waves can be stimulated. But the type of alertness will determine which brain wave is produced.
Alertness during an Alpha wave state is associated with a relaxed state. And a stressed alert state produces a Beta wave. But an excess of Beta brain waves contributes to a variety of nervous disorders including anxiety and stress.
Most of the clinical studies available done with humans use GABA supplementation rather than Phenibut. But the outcome of using GABA could be applied to using Phenibut to increase GABA levels in the brain. Phenibut crosses the blood-brain barrier more effectively than GABA.
In this study, researchers investigated using GABA on relaxation and immunity during stress in humans. They evaluated the effect on 13 subjects of GABA intake on brain waves.
An electroencephalogram (EEG) was used to measure brain waves after subjects took water only, GABA or L-Theanine. 60 minutes after administration, the study showed that GABA significantly increased Alpha waves and decreased Beta waves compared to water or L-Theanine.
The researchers concluded that raising brain levels of GABA induced relaxation and diminished anxiety.[xii] And you raise brain levels of GABA effectively when supplementing with Phenibut.
How things go bad
Low levels of GABA are associated with a variety of health problems.
↑ Anxiety[xiii], panic attacks, stress, PTSD, and insomnia
↑ Muscle spasms, hypertension, convulsion, Tourette’s Syndrome and epilepsy
↑ Dry skin and wrinkles
↑ Poor digestion, bloating, flatulence, and constipation
When your neurotransmitters, including GABA, are in balance, you feel motivated, productive and energetic. And you feel calm and relaxed during downtime.
When GABA levels are low you feel filled with dread, you’re constantly worried, you have racing thoughts, and you’re frequently late and disorganized.[xiv]
Many people in this GABA-slump resort to high carbohydrate foods, and drugs or alcohol to relax.
Phenibut benefits
Phenibut is an analogue of GABA. The addition of a phenyl ring allows Phenibut to cross the blood-brain barrier much more easily than GABA taken as a supplement.
We need adequate GABA levels in our brain because it’s an inhibitory neurotransmitter. When we raise GABA levels by supplementing with Phenibut, we help keep glutamate in check.
Glutamate is your body’s most abundant excitatory neurotransmitter. Which is responsible for attention span, brain energy, learning ability, memory, and staying awake.
So GABA is calming and glutamate is stimulating. And they must be in balance with each other for optimal cognitive health.
An imbalance of these two neurotransmitters can cause fibromyalgia, chronic fatigue syndrome, poor memory and cognition, anxiety and depression.
But when these two neurotransmitters work together efficiently, you feel relaxed with no stress or feelings of anxiety. And you get a more restful night’s sleep.
Adding Phenibut to your nootropic stack can help bring GABA and glutamate back into balance.
How does Phenibut feel?
When you balance GABA levels in your brain, you feel relaxed and calm. But many neurohackers who try using GABA as a supplement don’t feel the effects. Because the GABA molecule is too large to cross the blood-brain barrier.[xv]
Note: If you do feel the calming effects of supplementing with GABA within a ½ hour of taking it, it may mean you have a “leaky” blood-brain barrier. Not a good thing.[xvi] Because if GABA can get through, all kinds of nasty stuff can get through too. Including toxins, undigested food particles and anything else in your blood stream that shouldn’t be in your brain.
See my article on how to fix a “leaky” blood-brain barrier here: How to Heal a Leaky Blood-Brain Barrier
But here were talking about increasing our GABA levels using Phenibut. Neurohackers report that adding Phenibut to their stack relieves anxiety, there is less stress and they feel more relaxed.
In fact, some say it’s the best anti-anxiety ‘medication’ they’ve ever used. Including some well known pharmaceuticals (i.e. Clonazepam, Diazepam, Alprazolam) used to treat anxiety. With none of the nasty side effects that come with prescription meds.
Social functions could get some help with Phenibut. You could feel less inhibited, speak freely and feel more confident.
Others report that Phenibut boosts sex drive, and for men it helps control ejaculation. And it helps for a better night’s sleep.
Athletes report that Phenibut goes well with a workout. Because Phenibut has been shown to boost Human Growth Hormone. You’ll be able to work out with less fatigue, energy levels will go up, muscles won’t be as sore and recovery could be faster.
Phenibut takes 2 – 4 hours before you begin to feel its effects. A strong word of caution: do not increase the dose or take additional Phenibut if you think things are not happening fast enough! Wait at least 24 hours before taking another dose.
Phenibut Clinical Research
GABA was identified as a neurotransmitter several decades ago. And there had been a lot of research on GABA published since. But most of it is focused on how GABA works. And the drugs and chemicals which affect its action.
There is very little research available on using GABA as a supplement. Likely because most scientists believe that GABA taken as a supplement will not cross the blood-brain barrier.
And there is even less research available on using Phenibut. Particularly in humans. Most of the clinical trials have been done in Russia and were done with animals.
Here we talk about how GABA can affect your cognition and overall health. This research supports the idea that using Phenibut to raise GABA levels can have a profound effect on your quality of life.
GABA Increases Human Growth Hormone
Bodybuilders and athletes use Phenibut or even GABA to help repair and build muscle. And there are several studies supporting the notion that GABA increases Human Growth Hormone.
In one study, researchers worked with 19 subjects who were given a single oral dose of 5 grams of GABA. 18 subjects were given a placebo during this trial. 3 hours after the administration of GABA, blood samples were taken. The team reported that “GABA caused a significant elevation of plasma growth hormone levels”.[xvii]
GABA helps Reduce Insomnia
A Los Angeles study conducted a randomized, double-blind, placebo controlled trial with 18 patients with sleep disorders. The patients received either a placebo, or Gabadone (a combination of GABA and 5-hydroxytryptophan).
The difference between the two groups of sleep-deprived patients was significant. The Gabadone group fell asleep faster, stayed asleep longer, and had a better quality of sleep than the placebo group.[xviii]
Neurohackers consistently report a similar effect on sleep quality when using Phenibut.
Recommended Phenibut Dosage
The recommended daily starting dosage of Phenibut is 200 – 300 mg. for a relaxation or calming effect. Give it 2 – 4 hours before it starts to kick in. Your Phenibut dose should be taken on an empty stomach.
More experienced Phenibut users go with high doses of up to 1 – 1 ½ grams per dose. And up to 3-times per week.
Since you can quickly build up a tolerance to Phenibut dosing less often is preferred. Many advise keeping Phenibut use to once or twice per week with almost no side effects and no hangover the next day.
Phenibut can be very addictive for some people and the withdrawal symptoms from continuous use is particularly nasty. So if you’re going to try Phenibut make sure you follow dosage recommendations to prevent Phenibut overdose.
Phenibut Side Effects
Phenibut is considered safe when taken in normal recommended doses.
Bodybuilders who use much higher doses of Phenibut do report experiencing flushing, tingling, a spike in heart rate and blood pressure, and anxiety.
You can build up tolerance to Phenibut quickly. And if you have an addictive personality you should avoid using Phenibut.
Most neurohackers suggest cycling Phenibut. Using recommended doses for 4 or 5 days and taking a few days off. Others suggest only using Phenibut once per week.
You’ll have to find out what works for you if you decide to try Phenibut. And expect to have a rough ride at first. Too much and the withdrawal can be nasty. Phenibut withdrawal symptoms can occur even with short-term therapeutic use.
While it is considered legal to use Phenibut as a nutritional supplement in the United States, it is highly advised that you do so with caution. It is technically not a controlled substance, but it is dangerous for those taking Phenibut with other substances.
For example, you are strongly advised not to combine Phenibut with alcohol. And absolutely DO NOT combine Phenibut with benzodiazepines. Or you could put yourself into a coma that you may not come out of. Avoid anything that touches or increases GABA when using Phenibut.
Where to buy Phenibut
Phenibut as a supplement is available in tablet, capsule and powder. Scientists have shown that Phenibut easily crosses the blood-brain barrier.
Phenibut is an analogue of GABA developed in Russia, and it increases levels of GABA in your brain. While some report that Phenibut causes drowsiness and fatigue, it’s a much safer way to boost GABA than with benzodiazepines. But do NOT combine either benzos or any drug that raises GABA with Phenibut because you could put yourself into a coma.
I recommend Cosmic Nootropic – Phenibut.
Nootropics Expert Recommendation
Phenibut 200 – 300 mg per day.
I recommend using Phenibut (with caution) as a nootropic supplement if you’re feeling anxiety or stress. And to calm or keep in check the stimulatory effects of some nootropics.
Your body does make GABA on its own from glutamate in your brain. Most healthy people have an adequate supply of GABA. But if you’re dealing with anxiety or stress and need some extra help in calming things down, Phenibut can help.
Phenibut is particularly helpful if you’re dealing with Post Traumatic Stress Disorder (PTSD). I’ve seen reports by combat veterans who say that Phenibut worked far better than any prescription anti-anxiety med.
I suggest trying a Phenibut dietary supplements first at a dose of 200 – 300 mg. Phenibut can be a powerful method of boosting GABA levels in your brain. But it also has addictive potential especially if you’re prone to addiction.
Phenibut takes 2 – 4 hours to take effect in your body. Do not yield to temptation and take more just because you’re not feeling anything. Sometimes the beneficial effects of Phenibut are not felt until the next day.
Cycle your use of Phenibut to avoid tolerance and side effects. Your sweet spot could be every 2nd or 3rd day. Or even just once a week. Find out what works best for you.
The ‘hangover’ from abusing Phenibut is particularly nasty. You should be able to avoid these side effects by keeping doses low. And limiting the days you use Phenibut.
You can safely work your way up to 1,500 mg of Phenibut per day on the day that you dose. Some athletes go as high as 3,000 mg. But for nootropic use, a higher dose is not necessary or recommended.
I recommend Cosmic Nootropic – Phenibut.
Join The Discussion - 155 comments
Gio
August 24, 2022
Hi David. Great website. Very useful and informative.
There are anecdotal reports of people using Fasoracetam to restore/recover GABA (B1?) receptor functionality and thus it might be useful on days that one does not consume Phenibut to prevent withdrawals and dependency. Similarly, Fasoracetam has been used by people trying to prevent withdrawals from Benzos. I know you do not have a Fasoracetam page, but I would appreciate your thoughts on the matter as I have several patients who are struggling with long-term Benzo use and the terrible complications that come up as a result of coming off of them. Thanks in advance. (And I’d be keen on a Fasoracetam page if you ever get to it :))
David Tomen
August 24, 2022
Gio, I have not done a review of Fasoracetam because I could not find enough peer-reviewed clinical studies in animals or humans to write an intelligent article on it.
If you can point me to enough evidence on what Fasoracetam is used for, where it comes from, its mechanism of action, and studies on its successful use I’ll put it on my “to-do” list. But it needs to be medical journals and the like. Not some other website.
Gio
August 25, 2022
Thanks for you response, David. I must agree with you. I have also struggled to find any real scientific evidence and therefore was just hoping that you had maybe found more information. This review (https://www.tandfonline.com/doi/full/10.1080/14728214.2020.1820481) mentions four human trials with fasoracetam, but apparently they are, as of yet, unpublished.
I guess my question still remains though, is there a nootropic stack and protocol that you could suggest which might help with people suffering from phenibut withdrawals?
Thanks again for your time.
David Tomen
August 31, 2022
Gio some have reported that using Phenylethylamine (PEA) (https://nootropicsexpert.com/phenylethylamine/) helped them get off Phenibut without going through withdrawal.
Robin
July 13, 2022
Hello David,
I recently heard about phenibut through a holistic doctor. I am currently undergoing a detox from kratom and suboxone. Im sure you know that both work on the opiate receptors in the brain. I am receiving NAD infusions to help with the detox and taking Lucemyra for withdrawal symptoms. I also use between 10 to 20 mgs of Valium per day but I have the worst insomnia as part of the opiate withdrawal. I’d like to get off the valium too. If I use phenibut, will it help with my insomnia and to wean off Valium? I do not plan on using phenibut regularly. I simply want to get some sleep during this detox. Any advice would be greatly appreciated.
David Tomen
July 13, 2022
Robin, absolutely DO NOT combine Phenibut with Valium. Or you could put yourself in a coma that you may not come out of.
Do not use anything that in any way touches GABA or the same thing will happen. The only thing you can do to assist with sleep is magnesium chelate 400 mg, 500 mg L-Tryptophan, and if that doesn’t do it then add CBD Oil. None of those will increase GABA or get you into trouble while using Valium.
Benjamin
June 15, 2022
Hi David! What do you think about this public speaking stack:
– 250mg Phenibut + 200mg L-theanine
– 750mg Aniracetam + 250mg CDP + 2mg Nicotine + MCT
– Propranolol 20mg + 200mg L-DOPA
Taken all at once… And only when needed.
What do you think about this?
David Tomen
June 15, 2022
Benjamin, for verbal fluency: L-Theanine, Phosphatidylserine (PS), Uridine Monophosphate and CDP-Choline. To that I’d add ALCAR, Aniracetam, low dose Nicotine and L-Tyrosine.
But I would not be using Phenibut, Propranolol or L-DOPA.
Lisa
June 13, 2022
I am coming off of benzos, its been 3 years so far. Would you recommend this for someone in my situation that is needing more GABA? I am taking a variety of supplements that are nervines and that help to lower my glutamate. Thanks!
David Tomen
June 13, 2022
Lisa, I would not recommend Phenibut if all you are trying to do is increase GABA. Use PharmaGABA if you want to increase physical levels of GABA in your system.
Phenibut is to much like a prescription drug and I do not recommend it for most people. You’re off of benzo so the last thing you need is Phenibut.
I also suggest you start with 2 – 3 supplements to increase BDNF for brain repair: https://nootropicsexpert.com/13-nootropics-to-boost-bdnf/
Lisa
June 14, 2022
David, does that cross the blood-brain-barrier? Is that much different than just the regular GABA supplements that do not cross the barrier?
David Tomen
June 14, 2022
GABA does cross the blood-brain barrier. PharmaGABA does so more easily than regular synthetic GABA and you can use a much smaller dose (ie. 250 mg).
Lisa
June 14, 2022
Also, I am already taking: Ashwaganda, L-Theanine, Magnesium and NAC. And I am about to start the Gota Kola.
David Tomen
June 14, 2022
Those are all effective for raising BDNF.
Mario
April 9, 2022
Hi David! Will Phenibut be useful for songwriting sessions?
David Tomen
April 9, 2022
Mario, I’m not sure. What state are you looking for to be in while songwriting?
Erik
April 1, 2022
Hi David, thanks for your work, I’m a long time admirer.
With phenibut becoming less accessible in recent years, do you have an opinion or recommendation on the “next-best option” for similar effects on GABA?
We just realized my wife had a form of anxiety attack a few weeks ago. It has caused consistent pins and needless since, which she had never experienced previously (though she has had some insomnia for the last year or two). She’s working with her doctor of course, but the medications have only helped maybe ~25% (I’m sure she’s still in an upcycling phase though). Based on my previous use of phenibut, I can’t help but wonder if it might help her get past this spell of pins and needles (which exacerbates her insomnia, which in turn seemingly increases the pins and needles, etc.).
Thank you!
Erik
David Tomen
April 2, 2022
Erik, is she going through menopause? Because if she is Myo-inositol (https://nootropicsexpert.com/vitamin-b8-inositol/) is likely a better option for her.
Mick
December 30, 2021
I was using it carefully about twice a week. It’s strange, because it never happened to me with any other nootropics that I used before.
David Tomen
December 31, 2021
Mick, it probably would not with other nootropics. Phenibut is unique and about as close to an over-the-counter benzo as you can get.
Mick
January 1, 2022
Yes. It’s one of my favourite nootropics.
Thanks David!
Mick
December 29, 2021
Hi David,
Thank you for our last consultation and recommending sulforaphane as one of the nootropics for my condition. When my girlfriend found out about it, she told her sister who lives overseas and has an autistic child. Because this supplement is also useful for autism for improving social interaction and verbal communication it could be useful for both of us, so thanks for that.
I bought some phenibut powder that was working really well in the beginning, but after about a year or so, it stopped working completely. The only thing I can think of is the expiration date, that would make it less potent, but I can’t feel anything even if I use a higher dose. It feels like I haven’t taken anything at all. It was always kept away from the sunlight in the dark place. I can’t think of anything else. Do you have any ideas why would it stop working?
David Tomen
December 29, 2021
Mick, how often were you using Phenibut? Because you can quickly develop a tolerance to this nootropic and is why experienced users only use it 2 – 3 times per week.