Phenibut is often referred to as the nootropic for happiness. It increases dopamine levels, relaxes and improves our mood. It is therefore often used for anxiety attacks or mild depression. But it can also improve the quality of sleep. In this article, we will try to explain the importance of dosage instructions, in addition, whether it is suitable for long-term use and whether Phenibut has side effects.

Phenibut effects

Phenibut (or Fenibut) is a GABA analogue, a type of neurotransmitter in the brain. Receptors in the central nervous system that triggers fear, anger, panic, joy or stress, for example, can be influenced by this neurotransmitter. Learn more about the exact mode of action of Phenibut in the brain HERE.

Phenibut is mainly used to positively influence the body's cognitive responses. In particular, it is known and desired for the following effects:

- relieves anxiety-related issues
- supports better attention and performance
- supports better concentration
- enhances the mood
- relaxes
- reduces anxiety and stress
- helps with sleep problems
- improves of motivation and drive
- supports libido

What do you have to know about Phenibut dosage?

First of all, you should always follow the dosage instruction that appears on the package and strictly observe yourself.

However, when using Phenibut, always start with the lowest possible dose. For the beginners, we recommend starting with 250 mg, which can be taken up to 2 times a day.

It may take a few days to notice the particular effect. Each person and body reacts differently, so be patient if the effect delays to strike. Important: do not take the higher dosage before you make sure that the Phenibut dose you take isn’t enough for your body. And the question pops in - how to make sure? Just be patient and carefully supervise your body.

The correct dosage of the nootropic Phenibut depends heavily on what exact effect you are expecting from it. A very low Phenibut dose is usually recommended for anxiety attacks or stress. Sleep disorders, on the other hand, are treated with higher doses. However, a huge Phenibut dosage doesn't help much with sleep-related issues due to the alertness that can be enhanced with a higher dosage.

The following Phenibut doses are recommended depending on the symptoms:

- beginners dose: a maximum of 250 mg (max. up to 2 times per day).
- Phenibut dose for social anxiety or other anxiety-related issues, reduction of restlessness: a maximum of 750-1000 mg per day (a Phenibut max dosage).
- Phenibut dosage for sleep: 250 mg - 500 mg per day.

Does Phenibut have any side effects?

Yes, there are side effects with Phenibut that you should be aware of if you decide to take the nootropic. Since it can influence the cognitive functions in the brain - the receptors that control our emotions in particular - desired but also undesirable side effects are possible. It also includes, for example, those cognitive and mental issues that one wants to combat, such as depression, sleep disorders, listlessness and the like.

One of the most common side effects is that Phenibut can be addictive. In addition, with continuous use, you may build up a tolerance for the nootropic. It means that the body gets used to the Phenibut dose, which can lead to an excessive increase of the dosage. Continuous use of Phenibut could also lead to withdrawal symptoms. For this reason, it is important to only take Phenibut for a limited period (a maximum of two to three weeks is recommended) or with breaks. To avoid the risk of addiction, some users alternate using it for two weeks and then take another two weeks off. At best, however, it should be used as infrequently and briefly as possible to cope with acutely stressful situations. In addition, accompanying treatment by general practitioners is always recommended.

When taking Phenibut, there can be various cognitive and physical side effects, which can vary in severity from person to person. Phenibut must always be handled responsibly. Learn more about Phenibut side effects in our other article.

Is Phenibut overdose dangerous?

First of all, one should note that the effect of Phenibut does not appear immediately, but can take a few hours or even days. Typically, however, the hoped-for effect can then last for a whole day.

Under no circumstances should you add more doses, i.e. take more or more frequent doses. It is essential to avoid an overdose of Phenibut. Especially with Phenibut overdoses, serious side effects can occur. Phenibut overdose symptoms are the following:

- severe tiredness
- drowsiness
- balance disorders
- nausea & gastrointestinal complaints
- unusual dreams
- numbness in the limbs

If in doubt, always get medical help in the event of an overdose or severe side effects.

Is Phenibut suitable for long-term use?

Phenibut should be taken when needed or when there are acute problems, but not for weeks or even permanently. It is not a dietary supplement suitable for long-term use.

One of the reasons is that long-term use of Phenibut carries a high risk of addiction.

According to experience reports from Phenibut users, the side effects after prolonged use and abrupt cessation are also very unpleasant.

Severe insomnia and anxiety have been reported, among others. The intake of Phenibut should therefore not exceed one to two weeks and should be accompanied by breaks if possible. After prolonged use in high doses, it is recommended to reduce the use step by step ("tapering off"). Phenibut is therefore not recommended for long-term use.

Can I take Phenibut by other means?

Of course, it depends on the means or medication. Phenibut and alcohol, for example, are absolutely taboo, as it can possibly increase the effect in each case. The same applies to patients with certain previous illnesses or pregnant women. Phenibut should also be avoided in epilepsy.

You can find all over-the-counter nootropics to order here: Phenibut, Noopept, Melatonin, Uridine, Gaba, Kratom, Bacopa-Brahmi, L-theanine, Ashwagandha.

Learn more about the Top 11 best nootropics here.


Text author:
Kay Svegler
Communications, PR, American Studies, University of Leipzig
Journalist and freelance writer (e.g. Süddeutsche Zeitung, BILD, MDR etc.)
Former Senior PR Manager for Fischer Appelt, Sustainability and Diversity Manager for DKB