PHENIBUT
142 Reviews
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Buy Phenibut Online For Pharmaceutical Testing
Phenibut is a capsule GABAergic research compound that has been studied for its claimed anxiolytic and nootropic properties. It is commonly used in some of the CIS countries as a mood elevator, a tranquilizer, and a nootropic for anxiety. The capsules may cause adverse reactions, including severe dependence if misused. [1]
Other names: | Aminophenyl butyric hydrochloride acid, Phenibut HCL, Fenibut, Fenigam; Phenigam; Phenybut; Phenygam; Phenylgamma; Phenigama; PHG; PhGABA; β-Phenyl-γ-aminobutyric acid; β-Phenyl-GABA; Noophen/ Noofen; Anvifen |
Form: | Pills (250mg) |
Active ingredient: | Aminophenyl butyric acid hydrochloride |
Excipients: | Lactose, potato starch, calcium stearate |
Formula: | C10H13NO2 • HCl |
Pharmacological classification: | Nootropic, anxiolytic |
ATC code: | N06BX22 Other psychostimulants and nootropic agents |
CAS Number: | 1078-21-3 |
Pharmacological action: | Nootropic, tranquilizing, anxiolytic, neuroprotective, antioxidant, antiplatelet |
Elimination half-life: | 5.3 hours (250 mg) |
Storage conditions: | Store in a dry dark place at temperatures no higher than 25°C. Keep out of reach of children. |
Shelf life: | 5 years |
Manufacturer: | Usolye Pharm |
Please note: In accordance with the FDA’s rules, we are unable to provide information regarding dosage and indications for use on our website. If you are seeking this information, we recommend referring to the official manufacturer’s instructions in English.
What Is Phenibut?
Phenibut is a derivative of the naturally occurring inhibitory neurotransmitter Gamma-Aminobutyric Acid, or GABA. An extra phenyl ring makes Phenibut cross the blood-brain barrier much better than the original compound. [2]
Phenibut was synthesized in the 1960s by Dr Perekalin the Soviet chemist and professor and was recognized in research for its potential to combine two opposite effects in the brain: stimulation and anxiety-reduction.
What is Phenibut Used For?
Phenibut is not intended to diagnose, treat, cure, or prevent any disease. It is primarily used in pharmaceutical testing and scientific research. Always consult a healthcare professional before using this product to determine if it is appropriate for you. If you are interested in additional information, you may refer to the official manufacturer’s instructions or relevant scientific literature.
Are Phenibut Capsules Safe to Take?
Please note that Phenibut has not been approved for use by the FDA. Any use of this product should be conducted under proper professional supervision in compliance with applicable laws and regulations. It is important to be aware of the potential side effects and contraindications.
FAQ:
Where to Buy Phenibut Online?
The best place to obtain Phenibut online safely is CosmicNootropic. You can buy original Phenibut with fast delivery. Phenibut nootropic capsules 250mg are tested and verified for product purity and identity by the official manufacturer. Note: Phenibut is produced by different official manufacturers. We reserve the right to ship Phenibut capsules of the same quality produced by different Russian manufacturers. The package might be different from the one presented on the website. The maximum order quantity is limited to 3 packs. Please note that due to regulations Phenibut can only be shipped to the US.
Can I order Phenibut to Australia?
We highly recommend refraining from purchasing Phenibut if you are from Australia. Phenibut is officially banned in Australia and will likely be stopped by local customs. In this case, we cannot be held accountable and will not be able to refund or reship your order. This may also concern countries such as Hungary, Lithuania, France or Italy.
Is Phenibut the Right Drug to Calm You Down?
In research, Phenibut capsules may have a calming effect in small doses and can improve sleep quality along with other positive Phenibut effects. Phenibut was used by Russian astronauts to decrease stress and maintain high performance levels. It is a known fact that the cosmonauts of the Soyuz-Apollo Space Project had Phenibut in their medical kits.
What Are Phenibut Alternatives?
There are safer Phenibut alternatives to support the nervous system, for example: Selank, Afobazole, Mexidol, Stresam as well as other non-medicational methods to reduce stress.
What Are Phenibut Recreational Use Restrictions?
Using Phenibut for recreational purposes poses serious health threats. If taken in large quantities for recreational purposes, it is likely to cause euphoria, hallucinations followed by tolerance and severe withdrawal symptoms. Other side effects of taking Phenibut high doses include delirium, dissociative effects, and even coma.
What Are Phenibut Reviews?
You can check some Phenibut Reddit reviews. There are also Phenibut Russian reviews which you can read via google translate. Please note that individual reviews from customers and Phenibut users may contradict the views of the CosmicNootropic team and are given for informational purposes only.
Can You Take Phenibut With Alcohol?
It is not recommended to take Phenibut with alcohol. This combination puts a considerable strain on the body’s nervous system, and can lead to respiratory depression (when the lungs do not exchange the gasses oxygen and carbon dioxide, resulting in apnea, vomiting, seizures, and more). This combination can be fatal depending on the individual, the dose taken, and the amount of alcohol consumed. Other possible effects of taking Phenibut with alcohol include: Organ damage, Loss of consciousness, Overdose, Death.
How Long Does Phenibut Stay In Your System?
Phenibut is typically detectable in a person’s system for around twenty-six hours, depending on the dosage and the user’s metabolism. Phenibut has a half-life for about five hours. A half-life is the amount of time it takes for 50% of a drug’s active substance to be metabolized in body.
Is Phenibut Addictive?
Studies indicate Phenibut may be just as addictive as Valium or Xanax. By misusing Phenibut by taking it too frequently or at too high of a dose, users put their health and life at risk.
What Are Phenibut Withdrawals?
If a dependence and tolerance to Phenibut are formed, users who suddenly stop taking it may experience withdrawal symptoms within several hours or days. The most common withdrawal symptoms are ‘rebound effects,’ which are more severe recurrences of the original symptoms. Withdrawal symptoms include: Anxiety, Insomnia, Depression, Agitation, Tachycardia (elevated heart rate), Psychosis, Fatigue, Loss of appetite. If you’re experiencing withdrawals and would like to treat them, it’s best to consult a medical professional or a rehabilitation clinic for help. You can get an individual assessment that’s tailored to your specific symptoms.
How To Taper Off of Phenibut?
If you have concerns about your Phenibut usage and intake, it is recommended to ‘taper off’ the drug rather than quit ‘cold turkey,’ meaning, it’s better to take smaller and smaller doses than to suddenly stop altogether. If you or someone you love is struggling with Phenibut intake, seek help from a qualified clinician or healthcare professional. They may be able to offer support to lessen withdrawal symptoms and concurrent mental health issues that may have contributed to the addiction. They can develop a taper-off schedule and potentially use other non-addictive medications to help.
How Does Phenibut Help With Alcohol Withdrawal?
Phenibut is believed to activate GABA receptors in the brain, similar to alcohol but without the intoxicating effects. In theory, this action might provide temporary relief from the symptoms associated with alcohol withdrawal.
What Does Research Say About Phenibut for Sleep?
In one study of sixty-two patients with anxiety disorders, researchers at the Sechenov First Moscow State Medical University found that participants who received a dose of phenibut had significantly reduced sleep disorder symptoms. Another study concluded that phenibut was an effective sleep aid for patients with alcoholic abstinence syndrome. Please note that research is still limited and further studies need to be conducted.
How Can Phenibut Help You Sleep?
Phenibut is a chain of amino acids that resembles neurochemicals in the brain that our body naturally produces. Phenibut looks like γ-aminobutyric acid (gamma aminobutyric acid), also called GABA. GABA is an important neurochemical responsible for 'depressing' or reducing the activity of nervous stem cells, which explains its effectiveness as a sleep agent in research.
Is Phenibut a Gaba?
Phenibut and gaba are not the same. But they are extremely similar, with gaba being another depressant that’s meant to mellow the central nervous system.
Is Phenibut a Benzo?
Phenibut nootropic capsules are not benzos. That said, phenibut could be seen as a sort of close cousin to benzos, especially when comparing how close they are in terms of effects, uses, and even addictive properties.
What Is the Difference between Phenibut vs Gabapentin?
Phenibut and gabapentin are both GABA analogs, so they’re similar in composition, effect, and use. However, they’re not the same. The main difference is that phenibut has an affinity for GABA receptors, so the substance binds to the receptors, specifically those that are responsible for sleep, memory, and sedation Gabapentin does not.
What's The Difference Between Phenibut Vs Baclofen?
Phenibut and baclofen are chemically similar substances, but they’re not the same, nor are they used for the same reasons. The main difference between these two substances is that baclofen is FDA-approved and prescribed for muscle relaxation and alcohol withdrawal, whereas phenibut is a research substance studied for its anxiolytic and cognitive properties and cannot be prescribed for medical purposes in the US.
How Long Does Phenibut Withdrawal Last?
Phenibut withdrawal can last as little as two days to two weeks, but for more steady users or those who often mix phenibut with other drugs or alcohol, it can last as long as years.
How Does Phenibut Work?
Phenibut works similarly to gamma-aminobutyric acid (GABA), the brain’s primary inhibitory neurotransmitter that produces a sedative effect on the body. But unlike GABA, phenibut penetrates the blood-brain barrier and binds to receptors in the brain, allowing it to relax its user and, at times, increase dopamine levels.
Is Phenibut Legal in the US?
FDA has not approved phenibut for use in the United States. So any consumption of this research substance comes at one’s own risk.
Does Phenibut Lower Blood Pressure?
Studies suggest that phenibut can lower your blood pressure, but it is not meant to be taken as a blood pressure supplement. If you take too much phenibut, your blood pressure can drop to a dangerous level, so be careful. In Russia, they say you should never take more than 750 milligrams in a dose or take it more than three times a week to avoid dependency, tolerance building, overdose, and other potential issues.
What is Phenibut Dosage?
The most common dosages indicated by the official manufacturer are 250–500 mg, 2-3 times a day. The maximum single dosage is 750 mg. The usual course duration is 2-3 weeks. One pack of Phenibut capsules 250mg contains 20 pills.
It is advisable to refrain from Phenibut high dosages when testing the product. Please seek professional consultation prior to testing the product.
What are Phenibut Side Effects?
The most common adverse reactions to the drug are an increase in irritability, lethargy, dizziness, and nausea.
If Phenibut is used for a long time at high doses, a hepatotoxic effect, including fatty liver dystrophy, and eosinophilia may occur because of the Phenibut liver toxicity.
It is contraindicated to take more than the recommended dosages prescribed by a licensed clinician or healthcare provider, nor should a person increase the dose without consulting a healthcare professional. When users testing the product take too high of a dose or increase the frequency without professional consultation, side effects are reported to be more noticeable.
For more information on Phenibut dosages and side effects, please refer to the translated official drug sheets in English.
- I Lapin (2001) Phenibut (beta-phenyl-GABA): a tranquilizer and nootropic drug https://www.ncbi.nlm.nih.gov/pubmed/11830761
- G Shul’gina, E Ziablitseva (2005) Effect of the GABA derivative phenibut on learning https://www.ncbi.nlm.nih.gov/pubmed/15776965
- E Ziablitseva, I Pavlova (2007) Effect of GABA receptor agonist phenibut on behavior and respiration of rabbits in the negative emotional situation https://www.ncbi.nlm.nih.gov/pubmed/17944107
- E Zyablitseva, I Pavlova (2008) Effects of the GABA receptor agonist phenibut on behavior and respiration in rabbits in emotionally negative situations https://www.ncbi.nlm.nih.gov/pubmed/18607733
- Dambrova et al (2008) Comparative pharmacological activity of optical isomers of phenibut https://www.ncbi.nlm.nih.gov/pubmed/18275958
- Ziablitseva et al (2009) The effects of agonists of ionotropic GABA(A) and metabotropic GABA(B) receptors on learning https://www.ncbi.nlm.nih.gov/pubmed/19476215
- E Ziablitseva, I Pavlova (2009) Influence of GABA agonist phenibut on the neuronal activity and interaction in hippocampus and neocortex in emotionally negative situations https://www.ncbi.nlm.nih.gov/pubmed/19899708
- Borodkina et al (2009) Effect of phenibut on the content of monoamines, their metabolites, and neurotransmitter amino acids in rat brain structures https://www.ncbi.nlm.nih.gov/pubmed/19334514
- Tiurenkov et al (2012) Fenibut and its citrate prevent psychoneurological disorders caused by chronic stress (paradoxical sleep deprivation) https://www.ncbi.nlm.nih.gov/pubmed/22891435
- Samokhvalov et al (2013) Phenibut dependence https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3604470/
- Owen et al (2016) Phenibut (4-amino-3-phenyl-butyric acid): Availability, prevalence of use, desired effects and acute toxicity https://www.ncbi.nlm.nih.gov/pubmed/26693960
- Volotova et al (2016) Neuroprotective action of phenibut and neuroglutam in experimental cerebral ischemia on the background of altered immunoreactivity https://www.ncbi.nlm.nih.gov/pubmed/29949699
- Vavers et al (2016) The neuroprotective effects of R-phenibut after focal cerebral ischemia https://www.ncbi.nlm.nih.gov/pubmed/26621244
- Ahuja et al (2018) Phenibut (β-Phenyl-γ-aminobutyric Acid) Dependence and Management of Withdrawal: Emerging Nootropics of Abuse https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5952553/
- Joshi et al (2018) Dissociative intoxication and prolonged withdrawal associated with phenibut: a case report https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5662439/
- Kupats et al (2020) Safety and Tolerability of the Anxiolytic and Nootropic Drug Phenibut: A Systematic Review of Clinical Trials and Case Reports https://pubmed.ncbi.nlm.nih.gov/32340063/
- Kupats et al (2020) Mitochondrial-Protective Effects of R-Phenibut after Experimental Traumatic Brain Injury https://pubmed.ncbi.nlm.nih.gov/33274011/
- C Doyno, C White (2021) Sedative-Hypnotic Agents That Impact Gamma-Aminobutyric Acid Receptors: Focus on Flunitrazepam, Gamma-Hydroxybutyric Acid, Phenibut, and Selank https://pubmed.ncbi.nlm.nih.gov/34396551/
4.5
Based on 142 Reviews
(117)
(7)
(3)
(3)
(12)
03/20/2025
Joshua B.
Verified BuyerUS
Absolutely best noorotropic ever!
Such a relaxing calm with no hangover feeling after use. Totally recommend for anyone struggling with anxiety.
03/20/2025
Cosmic Nootropic
Dear Joshua, thank you for your great review! We're so glad our nootropic helped with relaxation and anxiety. Your recommendation means a lot to us!
03/07/2025
Cody D.
Verified BuyerUS
Amazing
This is by far the best Phenibut I have used!
03/08/2025
Cosmic Nootropic
Dear Cody, thank you for your feedback! 🤗
02/15/2025
Joanne W.
Verified BuyerUS
Great resource
I truly love getting a solid nights sleep with Phenibut.
02/18/2025
Cosmic Nootropic
Dear Joanne, thank you for sharing your experience, we really appreciate your feedback! 🙌
01/25/2025
David M.
Verified BuyerUS
Phenibut
I’ve used Phenibut for years, and as another reviewer stated, this is legitimate Phenibut HCL; it is an excellent product to help ease anxiety and boost self-confidence and mood. In addition, it always seems to help me with my sleep quality. Do your research. Onset is 2-4 hours, peaks about 4-6 hours afterward, and can stay in your system for about 24 hours. Respect this product, follow recommended dosages, and USE SPARINGLY to maintain efficacy and to avoid tolerance and dependency (I use one dosage 1-2 times a week at most). Lastly, I would like to add that I’m very impressed with Cosmic Nootropics products and outstanding customer support. Thank you
02/05/2025
Cosmic Nootropic
Dear David, thank you for the thoughtful review! We're so glad to hear you're having a positive experience with our Phenibut and that it’s helping with anxiety, mood, and sleep. We also appreciate your responsible approach to usage. Thanks for choosing us! 💛
01/24/2025
Laura P.
Verified BuyerUS
Phenibut
Always satisfied with product and service. Thank ypu
01/19/2025
Joanne W.
Verified BuyerUS
Phenibut is a big help
I only use occasionally. But it is a guarantee of a good night’s sleep.
01/19/2025
Cosmic Nootropic
Thanks for the great review, Joanne. We’re glad to hear that Phenibut is helping you get a good night’s sleep!
01/14/2025
Justin C.
Verified BuyerUS
Satisfied
There was some confusion with the payment. I was asked to dispute my charge and pay again. This seemed really sketchy. I hope you guys work something out with your payment options as I'm cautious about shopping with you again
01/15/2025
Cosmic Nootropic
Dear Justin, thank you for sharing your feedback! We're actively working to improve our payment system to ensure smoother transactions in the future. Your concerns are important to us, and we appreciate your patience and understanding. We hope to serve you again soon!
12/21/2024
Thomas C.
Verified BuyerUS
Excellent
First time trying Phenibut and didn’t know what to expect. Really good quality and will be purchasing again.
12/22/2024
Cosmic Nootropic
Dear Thomas, Thank you for your review! We're delighted that you enjoyed the product and hope to see you as a customer again soon!
12/07/2024
Kevin j.
Verified BuyerUS
Overpriced
Good until price went up. Much cheaper elsehere
12/07/2024
Cosmic Nootropic
Thank you for your feedback! We understand your concern about pricing. Unfortunately, the high costs of logistics, financial, and legal risks make price reductions unlikely at this time. We remain committed to keeping our products accessible and will reassess if circumstances improve. Feel free to reach out with any further questions!
12/06/2024
Michael C.
Verified BuyerUS
Phenibut works well.
I use 1-2 tabs of Phenibut about twice a week and it helps me relax for a good nights sleep. I save it for my nights when I have a busy, stressfull day coming up and can't afford a bad night's sleep. I don't over use it or abuse it and this way there's no dependency, tolerance, withdrawal, side effects, etc.
12/06/2024
Cosmic Nootropic
Hi Michael! Thank you for your thoughtful review! It’s great to hear that our product is helping you relax and prepare for restful nights when you need it most. We’re glad our product is meeting your needs, and we appreciate you sharing your experience! However, please note that it's essential to follow the manufacturer's instructions and your doctor's recommendations. If you ever have questions or need support, don’t hesitate to reach out!
12/05/2024
P.S
US
This is pharmaceutical
Works fine and it\'s 100% , not 62% or 96% who knows what.You can by a kilo of that if you want?What are you getting?I will pay for pharmaceutical grade.
12/06/2024
Cosmic Nootropic
Hi! Thank you for your review! We're glad to hear you value the pharmaceutical-grade quality of our product :) We pride ourselves on offering reliable legitimate options that you can trust. Your commitment to quality speaks volumes, and we’re happy to provide exactly what you’re looking for. If you ever need assistance or have questions, feel free to reach out!
11/28/2024
Seth R.
Verified BuyerUS
Didn't Work
My review won't even make it to the website page, but I took larger and larger doses and felt nothing compared to other Phennibut manufacturers.
11/29/2024
Cosmic Nootropic
Hi Seth! We’re sorry to hear this product didn’t meet your expectations. 😔 We aim to provide high-quality items and take all feedback seriously. It's important to remember that everyone is different and the reactions to different products depend on many factors and can vary. Please feel free to reach out to us if you have any questions —we’d be happy to discuss your experience further and assist you! 🙏
11/17/2024
Christopher H.
Verified BuyerUS
Damaged product apparently from usps
My. Package was damaged again I assume from USPS product unusable package was ripped and boxes had been torn pills had fell out in the bag very disappointed
11/17/2024
Cosmic Nootropic
Dear Christopher, We're sorry that you received a damaged product. Our support team has sent you a message, please check your inbox so we can resolve the issue quickly.
11/14/2024
Kenneth O.
Verified BuyerPhenibut
The quality of the product is good. However, other vendors offer a product as good as yours in bulk powder containing a lot more for a MUCH lower price.
11/15/2024
Cosmic Nootropic
Hi Kenneth! Thank you for your feedback! We’re glad to hear you’re satisfied with the quality of our product. While we may not always compete with bulk pricing, we strive to provide high-quality certified pharmaceutical products with reliable service and fast shipping. We appreciate your input and hope to continue serving you!
11/11/2024
Jacob G.
Verified BuyerUS
Never Recieved Item
I wish I could write a review for it, but I got charged and never received the item. USPS didn’t help and neither did cosmic nootropics
11/11/2024
Cosmic Nootropic
Hi Jacob! We're very sorry to hear about this experience. We’ve reached out to you via email to help resolve the issue, as your satisfaction is our priority. Shipping problems can be frustrating, and we're here to support you in getting this sorted out as quickly as possible. Thank you for your patience as we work on a solution together.
11/10/2024
Ruth B.
Verified BuyerUS
Mastercard
I would like to place an order but you said you’re having a problem with Mastercard and that you are working on it. Has it been fixed yet?
11/11/2024
Cosmic Nootropic
Hi Ruth! Thank you for checking in! We’re still working on resolving the issue with card payments and apologize for the inconvenience. In the meantime, we offer other payment options to ensure you can place your order smoothly. If you need assistance with this, please don’t hesitate to reach out—we’re here to help!
11/04/2024
Ian C.
Verified BuyerUS
Great quality, fast shipping
Great quality product and is really a game changer for me. Cosmic has gone out of their way to make orders right for me in the past, they're a good company. You won't be let down.
11/05/2024
Cosmic Nootropic
Hi Ian! Thank you so much for your kind words! We're thrilled to hear the product has made a difference for you and that you’ve had a great experience with our team.
11/03/2024
Charlotte N.
Verified BuyerUS
Phenibut
This IS legitimately Phenibut HCl. Excellent customer service- highly recommended. I have ordered various nootropics from them for years. (Be aware of companies that are not selling actual Phenibut hydrochloride.) Please BE CAREFUL WITH THIS PHENIBUT AND ONLY USE AS COSMIC NOOTROPICS INSTRUCTS. I am impressed with how careful their instructions are for their customers. FOLLOW THEM! Do NOT overuse. Charlotte, RN BSN Ohio - United States
11/05/2024
Cosmic Nootropic
Hi Charlotte! Thank you so much for your thoughtful and detailed review. We're glad to hear you're satisfied with the quality of our product and our customer service. We truly appreciate your long-standing trust in us for your nootropic needs. Your message about using the product safely and following our instructions is so important, and we're grateful for you highlighting that. We take pride in providing clear, responsible guidance to help our customers use products safely. Thanks again for your recommendation, and we're honored to continue serving you! Stay safe and take care.
11/03/2024
Ruth B.
Verified BuyerUS
Payment
You said you were working on the problem with Mastercard payment, has it been resolved? Can I pay with Mastercard?
11/05/2024
Cosmic Nootropic
Hi Ruth! We're working on it. Unfortunately, we can't say exactly when the card payment option will be available again, but we hope for the best. At the moment we have maximized our cryptocurrency payment discount up to 25% So we recommend considering this as a payment option. If you are not familiar with crypto, we have a step-by-step guide on how to set up a crypto wallet: https://cosmicnootropic.com/blog/crypto-wallet-a-step-by-step-guide/
10/25/2024
Laura P.
Verified BuyerUS
I still havent received it
10/27/2024
Cosmic Nootropic
Hi Laura! We're sorry to hear that! Please contact us at our support email ([email protected]) and we'll look into this situation.
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