Phenibut High: Facts, Considerations, & Risks

Updated on September 27, 2022
 by — reviewed by Jason Williams, PhD (Contributor: George Collins / Editor: Yoko Hill)

Phenibut as nootropics is used recreationally due to its ability to produce ecstasy, anxiolysis, and increased sociability; what if you get a Phenibut high?

Because of its delayed onset of effects, people often take an additional dose of Phenibut because they don’t feel any changes from the first dose.

Others are aware of the amount they should take to have that psychologically “feel good” effect.

Every wonder what is that one right dosage for people to feel the effects?

Let’s dive into this topic.

What is Phenibut High?

It is described as a euphoric feeling that is most often attributed to using very high doses of the drug or from mixing Phenibut with other substances.

getting high from phenibut

Other people may feel the “high” even with a smaller dosage, especially new users.

This type of recreational use can lead to intense, albeit short-lived effects similar to alcohol use, ranging from dizziness and euphoria to more extreme cases of blackouts or complete unconsciousness.

The feeling is comparable to the recreational effects and pharmacological activity of gabapentin. Both drugs are GABAergic, can decrease anxiety, and can cause sedation in higher doses.

Overview and How to Take Phenibut?

Phenibut is a GABA-B agonist and goes by the names β-phenyl-γ-aminobutyric acid or phenyl-GABA or Phenibut beta phenyl GABA.

overview and how to take phenibut

Phenibut (β‐Phenyl‐GABA), a tranquilizer and nootropic drug, is a neuropsychotropic drug.

Phenibut as nootropic is similar to a brain chemical called gamma-aminobutyric acid (GABA). It is used as a recreational drug and as a medical treatment.

Nootropics like Phenibut are close cousins to drugs in the benzodiazepines that affect the brain’s GABA receptors. These are responsible for the actions of benzodiazepines, barbiturates, and alcohol.

Some people swallow Phenibut with coffee or other caffeinated beverages. Others have it on an empty stomach to absorb it faster.

A 500mg to 750mg dose is the right amount if you want to make sure you want to get a full deep sleep. You can split it into 1-3 doses an hour before food.

If you’re just trying to have the edge of your anxiety, 250mg - 500mg is sufficient. You can also split it into 1-3 doses an hour before food.

For recreational dosage, 500mg - 750mg is suitable for those looking to try out the high for the first time.

If you are pregnant or lactating, consult your doctor before taking this drug. For new users, starting with a lower dose is always recommended.

People are encouraged to stop taking it if they have repeated cravings for the substance to prevent harmful effects, addiction, overdose, and abuse.

What does Phenibut Do?

In the United States, Phenibut is legal to possess, but not approved as a licensed pharmaceutical drug by the Food and Drug Administration (FDA). Regional poison center data suggest that Phenibut exposures have increased in recent years.

When ingested, Phenibut regulates brain activity in the central nervous system and stimulates dopamine receptors in the brain.

what does phenibut do

This is why it can produce such profound changes in our mood, as reflected in the CNS drug reviews.

Phenibut is a tricky substance, though. If it is taken too often, tolerance, abuse, dependence, and Phenibut addiction can build quickly, leading to Phenibut overdose.

If usage becomes habitual, then the user can experience Phenibut withdrawal symptoms when they try to quit.

How much Phenibut to Get High?

Taking Phenibut in 200 mg to 500 mg is a safe starting dose but may not help you get high. 500 mg to 700 mg would usually be enough to experience the feeling.

phenibut high featured image

The recommended dosage for Phenibut is approximately 200 mg - 1000 mg taken within 24 hours.

Using more than this amount of nootropics can be risky for overdose since the high can set in as early as 2 grams.

High Dose Benefits and Side Effects

Sleep promotion is one of the benefits of Phenibut to help achieve the most restorative stage of sleep.

It reduces stress and elicits a relaxed state experience, especially if you’re chronically stressed or anxious.

It can also have profound effects on cognition, mood, and energy levels.

It also reduces anxiety in general. Social anxiety can be debilitating, and Phenibut is regarded as one of the most effective over-the-counter solutions as anti-anxiety.

There are various positive effects of Phenibut. These include improved retention of information, clearer memories, tranquility, and euphoria, aside from stabilizing mood.

Some may experience peace or boost overall well-being, and it also increases alertness and sociability.

Symptoms may vary from nausea, vomiting, and bradycardia. In some people, it may show increased blood pressure, dehydration, and stomach cramps.

Tolerance, physical dependence, and withdrawal can occur after chronic use.

Phenibut Reviews and Experience Shared on Reddit

Here are experiences shared by the users.

According to Jake:

“Here’s what you can expect: At first, you’ll notice a feeling of elatedness. It’s a bit like the buzz from alcoholic substances but without the fuzziness. You just feel great and are free of anxiety, which significantly affects your mood. Think of it like the great feeling you get after working out, except you’re not exhausted, and your legs don’t hurt the next day.”

According to Savage Henry:

“After eating a small meal, it started to show effects about an hour later, maybe? Phenibut’s primary effect is just a sense of well-being with the world. I’m thinking today’s gonna be a good day. I’m also much more talkative and animated on Phen, similar to being buzzed or drunk but without being intoxicated in any way. It’s easier for me to jump into conversations instead of just keeping quiet like I usually do.”

Frequently Asked Questions (FAQ)

Let us answer your questions here.

How long for Phenibut to kick-in?

After oral administration, users report onset usually within 2-4 hours with full effect at 4-6 hours and duration of 15-24 hour time period (or about 3 to 5 terminal half-lives).

Some limited information has been described on the Phenibut’s pharmacology in recreational users taking much higher doses (e.g., 1–3 grams) than typical clinical doses.

How long does Phenibut Last?

The effects can start anywhere from the first 30 minutes and builds for a few hours. Phenibut lasts quite a while too.

The half-life means the time for half of the Phenibut to be eliminated from your body.

It’s about 5 hrs, so that means if you take 500mg, 5 hrs later, there will be about 250mg in your bloodstream.

The peak usually lasts around three or four hours, and the effect lasts even up to 18 hrs after that.

There’s also a kind of afterglow which can last up to a day after that, as reported by most people.

How Often Can You Take this Drug?

Phenibut should not be used more than twice a week to prevent withdrawal and tolerance build-up.

A tolerance build-up means that you need more of the substance to achieve the same results. This is one of the most common causes of overdoses in chemicals like benzodiazepines or even alcohol.

If you aren’t getting the same results from your usual dosage, have a week or two off, rather than merely increasing the amount taken.

It’s important to start with a low dose if it’s your first time taking Phenibut and wait to see how it affects you before redosing.

What Does Phenibut Feel Like?

Phenibut feels like a cleaner version of alcohol or benzodiazepines. It’s not quite as intoxicating as alcohol unless you take large doses, which is dangerous.

The effect of Phenibut can feel like a high, but it’s not like cannabis or other drugs. Phenibut does make you feel “high” in the way that your mood is boosted. That’s the specific goal of this nootropic - to make you feel good and not wasted.

However, the high does not overtake your rational thought processes, nor does it prevent you from operating a motor vehicle or getting work done.


Phenibut enhances mood and social skills in a very subtle way without drawing unnecessary attention to your behavior.

If this nootropic suits your body chemistry, it will give you the perfect balance that you need even if you are not taking it as a medication. However, you should still be mindful of the possible side effects.

Although there are instances that others self-medicate using this drug, its recreational use is still popular among users. However, getting high should not be the goal here. If you aim to relieve your anxiety, then use it for that purpose.

The key is to use nootropics and benefit from it. Its use should only be limited to the “good” use with specific amounts to avoid consequences that you might later regret.

People in the nootropic community eye Phenibut as a great product not because of its effects when taken in high doses but because of its possible contribution to the medical field.