Don’t Buy Phenibut Until You Read Our Reviews & Side Effects

Phenibut is a derivate of the natural neurotransmitter known as GABA. Users of phenibut claim this substance has anxiolytic and mood-elevating qualities. Phenibut was first synthesized in Russia and was used as a drug for the treatment of different medical conditions like insomnia, anxiety, PTSD, and other similar conditions.

Phenibut is also labeled as nootropic by some because it’s also said to be capable of enhancing cognitive performance. Improving sleep is another benefit of phenibut.

Even though phenibut is a derivate of GABA, it can still cross the blood-brain barrier so it can provide benefits faster compared to GABA supplements. The reason for this ability of phenibut is due to the addition of a phenyl ring to its basic structure.

While phenibut is a fantastic pharmaceutical agent with a vast number of benefits, being a neurologically active compound, there can be side effects to taking phenibut for long periods of time.

Our advice: Don’t buy phenibut until you read our reviews and side effects.

Withdrawal Symptoms of Phenibut

This neurologically active compound has been known to cause withdrawal symptoms in users. Every individual might not experience the same withdrawal symptoms, and the severity of the symptoms can also be different depending on various factors.

Here are some of the most common phenibut withdrawal symptoms.


Taking phenibut can help to reduce anxiety. However, discontinuation of the supplement can result in increased anxiety. Reports suggest that the severity of the anxiety might even be extreme, especially if the user was consuming high dosages of the substance. The reason behind this is GABAergic transmission, as it takes a while for your brain to go back to normal GABA function.


Calmness is one of the benefits of taking phenibut, however, withdrawing the supplementation results in increased irritability. The user could find it hard to remain calm and be continuously restless. It can take up to several weeks before you return back to your normal state of calmness. You might want to try going for a walk, deep breaths, and other techniques to take the edge off.

Primal Fear

Upon discontinuation, many users have reported feeling primal fear, which means that if you’ve recently discontinued your intake of phenibut, you might feel heightened threat detection, higher sensitivity to stimuli, and even adrenaline. The effect does wear off, but you have to do your best not to be obsessed over the feeling.


While phenibut users have reported that it promotes good sleep, those who have discontinued their supplementation have reported being unable to sleep despite physical exhaustion. Imbalance in GABA transmission can be the cause of this effect. You might want to consider taking some other medication if the effect is too severe.


Fatigue is one commonly felt symptom while discontinuing any neurologically active compounds. You will feel continuously exhausted, both physically and mentally. The only option is to rest whenever you can, and get proper sleep. The effects should wear off in few weeks.

Dizziness and Nausea

During the first week after discontinuing phenibut, you might feel dizziness and nausea. The nausea won’t always be as extreme to the point where you need to vomit, but it might cause a loss of appetite. Dizziness is a symptom that often goes hand-in-hand with other effects such as sleep deprivation and fatigue. You will want to seek countermeasures if the effects haven’t subsided after 1 or 2 weeks.


Vomiting is the extreme-case scenario that could be caused by discontinuation of phenibut. Suddenly quitting your medication from a high dose to nil could result in this effect. Your best bet is to lower your dose before quitting it for good.

Other Withdrawal Symptoms

  • Muscle tension
  • Sleep deprivation
  • Loss of appetite
  • Heart palpations
  • Hallucinations

Side Effects

Phenibut is considered to be relatively safe given that the user takes it with a mindset of caution. Even though some researchers claim phenibut to have no serious side effects, the hypothesis is subjective to the amount of the dosage taken by the user.

Usually, users who were prescribed phenibut by a doctor hardly experience any side effects of the medicine. However, phenibut is also purchased online without prescription, and depending on the health status of the user, there could be a number of side effects.

Drowsiness is a common side effect among phenibut users. Although not extreme, it could be troublesome if you need to be at your physical and/or mental best throughout the day.

The major side effects of this supplement are seen when the user takes other sedatives and/or drugs while using phenibut. Users should also avoid alcohol while supplementing with phenibut as it could lead to excessive GABA stimulation, spiking the GABA level in our brain.

The amount of phenibut dosage required for you is subjective to various factors. It’s wise to consult with your doctor regarding the substance. Otherwise, you might not have an adequate tolerance level for phenibut, causing you to overdose. Overdose of phenibut generally leads to sleepiness, lowered body temperature, and muscle relaxation. This could prove fatal if you have to work with machinery as a part of your job.

User Reviews

The main complaint for this drug has been recurring drowsiness. Also, some users have complained about not being able to stay active enough to concentrate in tasks after taking phenibut. The reason for this could be overdose, or the user has been taking other drugs or alcohol while taking phenibut.


It’s advised to consult your doctor before you start taking phenibut. Also, lower your dose, which lowers the chance of side effects. Another benefit of keeping your phenibut dose to a minimum is that you won’t be facing as severe withdrawal symptoms when you decide to discontinue the supplementation.