Phenibut: The Anxiolytic That Was Used by Cosmonauts

Phenibut is one of those nootropics that is described as ‘’experimental Soviet super soldier drugs’’, sometimes as a meme. This is probably untrue, but it was still made for decreasing anxiety and stress while not hindering performance, unlike most anxiolytics. It was included in cosmonaut kits to reduce cosmonauts anxiety. It is also reported by people to have increase performance, hence naming it a nootropic. 

What is Phenibut? 

Phenibut, (also known by its rather more scientific name beta-Phenyl-gamma-aminobutyric acid), is a central nervous system depressant usually classified as a nootropic. Phenibut was developed in Soviet Union during 1960s as a ‘’tranquilize’’ and was included in the kits of cosmonauts to reduce stress. While in post-Soviet countries it is being sold as pharmaceutical drug, in most other countries it is sold as a supplement unless Phenibut is banned in that country. Phenibut today is used by a lot of nootropics users to lower anxiety and increase sociability. 

How does Phenibut work? 

Phenibut works by raising the GABA (gamma-Aminobutyric acid) levels in the brain. Phenibut itself is derived from GABA and it is an efficient way to increase GABA levels, as GABA itself cannot pass the blood-brain barrier (BBB). Phenibut on the other hand can pass the blood-brain barrier. While higher GABA levels promote reduced stress and anxiety and improved sleep, lower GABA levels is associated with negative mental health conditions. 

What is Phenibut used for? 

Phenibut, in countries where it’s a pharmaceutical drug, is usually prescribed for anxiety, particularly social anxiety along with general anxiety, high levels of stress, depression, sleeplessness (insomnia), and as a treatment for alcoholism. In most countries where phenibut is available as a supplement, nootropic users use it as a way to increase sociability, enhance mood, as well as the reasons mentioned before. As phenibut is often used for its anxiolytic (anxiety-reducing) effects, along with cognitive enhancing effects. Some people may prefer it for social anxiety relief. 

What are the Benefits of Phenibut? 

  • Anxiety reduction: The primary reason why people use Phenibut is to alleviate anxiety. 
  • Enhanced Mood: According to some people, it is possible to have a better mood while using phenibut. 
  • Improved Sleep: Phenibut is known to make it easier to fall asleep. 
  • Improved Sociability: Phenibut may decrease anxiety and shyness while increasing confidence. 
  • Improved Concentration: Some users claim that phenibut improves cognitive function and focus. 

What are the Side Effects of Phenibut? 

Like other nervous system depressants Phenibut may commonly cause drowsiness, dizziness and nausea. It may also cause motor impairment and may have mood altering effects. Phenibut is also known to be addictive and might cause dependence and withdrawal on prolonged use or high doses. 

Dosage of Phenibut 

While dosage of phenibut is vague due to the fact that it is not well researched outside Russian Federation, there are users on the internet that suggest starting with 200mg to 500mg. More than 3 grams is considered heavy use and and should be avoided. If you are planning to use phenibut, consult your doctor as it is possible to overdose on phenibut. 

Legal Status of Phenibut 

As stated above, the legal status of phenibut varies by country and might be banned. Always check with your local law before buying or using phenibut. Here are some countries where phenibut is banned or prescription only: 

  1. Australia: Phenibut is a Schedule 9 substance in Australia, making it illegal to import, possess, or sell. 
  1. Canada: Phenibut is considered a prescription drug in Canada. It is illegal to sell or possess it without a prescription. 
  1. United Kingdom: Phenibut was classified as a Class C drug in the UK under the Misuse of Drugs Act 1971, making it illegal to possess, produce, or supply. 
  1. Hungary: Phenibut is classified as a controlled substance in Hungary, and it is illegal to buy, sell, or possess without a prescription. 
  1. Latvia: Phenibut is a prescription medication in Latvia, and its recreational use is prohibited. 
  1. Russia: Although phenibut was developed in the Soviet Union and is used medically in Russia, it is a controlled substance, and its sale and distribution are regulated. 
  1. Sweden: Phenibut is considered a prescription medication in Sweden, and its unauthorized sale and use are prohibited. 
  1. Lithuania: Phenibut is a controlled substance in Lithuania, and its unauthorized sale and use are prohibited. 

Keep in mind that those are just some clear examples and there may be more. 

Where to buy Phenibut?

If you live in a country where Phenibut is not a presciption medication, you can usually find it online on a variety of different stores. offers Phenibut in many different forms.

Like, PureRawz also offers Phenibut in Free Amino Acid form and Hcl form.

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