- HCl
- Capsules
250mgper capsule
Phenibut 250mg Capsules
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NOOTROPIX / PHENIBUT
Phenibut. Know what you’re choosing.
Compare HCl and FAA, explore capsules and powders, and check the details before you choose.
- Forms HCl · FAA
- Formats Capsules · Powder
- Risk Dependence, withdrawal and sedation. Read the safety information before you choose.
Compare
Two forms. Two formats.
Pick a form, then a format. Each pair differs by one thing.
Chemical form
Which version of the compound it is. Not a ranking of strength.
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HCl (hydrochloride)
Mixes in water · sharper taste
The hydrochloride salt of the same compound.
See HCl products -
FAA (free amino acid)
Less soluble · milder taste
The free amino acid form of the same compound.
See FAA products
Product format
How it is supplied.
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Capsules
Pre-measured
Labeled amount and count are on the product page and the pack.
See capsules -
Powder
You weigh it
Loose powder. Net weight is on the product page and the pack.
See powders
Range
Explore the Phenibut range.
Compare specifications and current availability.
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- HCl
- Capsules
500mgper capsule
Phenibut 500mg Capsules
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Documents
Product and batch documents.
Documents appear here only when they are linked to the selected product or its batch data.
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Basics
What is Phenibut?
Educational only. Not medical advice.
Phenibut is a synthetic compound related to GABA, a chemical messenger in the nervous system.
It is offered here in two chemical forms, HCl and FAA, and as capsules or powder. Published discussion often focuses on GABA-B receptor activity. That description of chemistry is not a claim about a typical customer result.
Technical detail
The compound is β-phenyl-γ-aminobutyric acid. The phenyl group is commonly described as helping it reach the brain more readily than GABA itself. HCl and FAA differ in solubility and handling, not in a proven milligram-for-milligram customer effect.
Evidence
What does the evidence support?
Understand the findings, their limitations and the questions that remain.
What effects have researchers described for phenibut?
PubMed — Lapin 2001Translation missing: en.sections.compound_guide.describes_label
Anxiolytic and sedative effects reported in the published literature, as summarised by the review authors.
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A typical customer result. A review is not a clinical trial, and the evidence base is limited.
Read more
Use the source for the authors’ wording and references. Additional research topics will be added here only when a source can be checked.
Educational only. Not medical advice. Reviews are not clinical trials.
Safety
Important safety information.
Understand the risks before considering Phenibut.
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Dependence and withdrawal
Do not use daily or frequently.
Regular or frequent use is associated with tolerance, dependence and withdrawal. Phenibut is not a daily product.
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Sedation and impairment
Do not drive or operate machinery if drowsy.
Phenibut can cause sedation and impairment. Wait until you feel fully alert.
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Alcohol and other sedatives
Do not combine with alcohol or sedatives.
This includes benzodiazepines and other sedating medicines. Combined sedation is the main acute risk.
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Professional advice
Ask a clinician first if any of these apply.
A medical condition, other medicines, pregnancy or breastfeeding, or previous regular Phenibut use.
If you already use it regularly
Do not stop established regular use suddenly without medical guidance. A clinician can advise on a safer plan.
Educational only. Not medical advice.
Options
Considering other options?
Compare the evidence, product differences and cautions.
| Option | Evidence | Cautions | Formats |
|---|---|---|---|
| L-Theanine 200mg Capsules | Discussed for calm focus. A different compound from Phenibut. | Not interchangeable with Phenibut. Not a substitute for medical care. | Capsules |
| Ashwagandha KSM-66 300mg Capsules | An adaptogen discussed for stress. A different compound from Phenibut. | Not interchangeable with Phenibut. Effects and cautions are specific to this product. | Capsules |
| GABA 500mg Capsules | The neurotransmitter itself, sold as a supplement. Phenibut is a synthetic compound related to GABA, not the same substance. | Not interchangeable with Phenibut. Effects and cautions are specific to this product. | Capsules |
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L-Theanine 200mg Capsules
Evidence: Discussed for calm focus. A different compound from Phenibut.
Cautions: Not interchangeable with Phenibut. Not a substitute for medical care.
Formats: Capsules
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Ashwagandha KSM-66 300mg Capsules
Evidence: An adaptogen discussed for stress. A different compound from Phenibut.
Cautions: Not interchangeable with Phenibut. Effects and cautions are specific to this product.
Formats: Capsules
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GABA 500mg Capsules
Evidence: The neurotransmitter itself, sold as a supplement. Phenibut is a synthetic compound related to GABA, not the same substance.
Cautions: Not interchangeable with Phenibut. Effects and cautions are specific to this product.
Formats: Capsules
These compounds are not interchangeable. This is not a ranking and it is not advice to combine products.
Delivery
Delivery by destination.
Available services, charges and estimates are confirmed at checkout.
Options confirmed at checkout
Available services, charges and delivery estimates are shown at checkout for the order address.
Options confirmed at checkout
Available services, charges and delivery estimates are shown at checkout for the order address.
Destination eligibility at checkout
Product eligibility, available services, charges and delivery estimates depend on the destination and are confirmed at checkout.
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Questions
Questions before you choose.
Product details
What is the difference between HCl and FAA?
HCl is the hydrochloride salt and mixes more readily with water. FAA is the free amino acid form and is less water-soluble. They are different chemical forms, not a ranking of strength.
What is the difference between capsules and powder?
Capsules and powder are product formats. Check the product page and the pack for the labeled amount, count or net weight.
Where do I find pack and label information?
Open the product page for the current label details. The pack itself is the source for amount, count and batch information.
How do I view batch documentation?
Product documents appear in Product and batch documents only when they are linked from current product or batch data. You can also browse the quality and COA library or send a document request.
Safety
What are the main risks?
Phenibut carries risks of dependence, withdrawal and sedation. Read the safety information before you choose.
Can I take Phenibut with alcohol or sedatives?
No. Do not combine Phenibut with alcohol, benzodiazepines or other sedatives.
When should I speak with a clinician?
Speak with a clinician before use if you have a medical condition, take other medicines, or have used Phenibut regularly. Do not stop established regular use suddenly without medical guidance.
Ordering
How fast is delivery?
Available services, charges and delivery estimates depend on the order address and are confirmed at checkout. Review the current delivery information before ordering.
Do you ship this product to my country?
Eligibility depends on destination and is confirmed at checkout. This page does not assume worldwide availability.
What if a product is sold out?
Use the restock form on the product card or the product page. A success message appears only after the form is sent.
What is the returns policy?
Returns follow the shipping and returns policy.
Next
Choose your next step.
View the range, re-read the safety rules, or keep browsing.