Phenibut FAA Powder: molecular data, studies & sources

Molecular formula, weight & structure

Molecular formula (MF)

C10H13NO2

Molecular weight (MW)

179.22 g/mol

PubChem compound ID

14113

Record title

Phenibut

The free amino acid (FAA) has a different formula and molecular weight from phenibut hydrochloride. Phenibut studies do not automatically establish equivalence between a studied preparation and a supplier powder.

Source: PubChem CID 14113 · retrieved 2026-09-21 · Identity cross-reference

Registered clinical trials

Studies registered on ClinicalTrials.gov that list Phenibut as an intervention. Studies that only measure the molecule as a biomarker are excluded. A registration describes a planned or completed protocol; it does not report a result. Active studies are listed first.

No registered study naming this compound was matched. This is a documented gap in registry coverage, not proof that no study exists.

Registry check 2026-10-01 · Run this search on ClinicalTrials.gov

Human and clinical studies

Selected human-study records are shown with their indexed or reviewed study type. Check the original article for the intervention, formulation and controls; the molecule can also be a comparator or measured variable.

1. Human observational study

   Efficacy of Noofen 250 mg Capsules for the Management of Anxious-Neurotic Symptoms in Patients with Adjustment Disorder.

   Tērauds E, Dansone G, Troshina Y et al. · Journal of clinical medicine · 2025

   Non-interventional observational study of a named capsule preparation in 90 patients. No randomized placebo group; not evidence of equivalence to FAA or HCl supplier powders.

   PMID 40807194 · DOI: 10.3390/jcm14155570

2. Human study · PubMed trial index

   [Bioequivalence of anvifen and phenibut].

   Zhezlova AV, Belolipetskaia VG, Blagodatskikh SV et al. · Eksperimental'naia i klinicheskaia farmakologiia · 2011

   PMID 21809698

3. Human study · PubMed trial index

   [Effect of phenibut, obsidan and their combination on the human functional state in hyperthermia].

   Makarov VI, Tiurenkov IN, Klauchek SV et al. · Fiziologiia cheloveka · 1998

   PMID 9567480

Preclinical research, reviews & other publications

Animal studies, laboratory experiments, reviews and other indexed papers answer different questions. A review is secondary evidence; a case report does not estimate how often an outcome occurs.

1. Review · secondary evidence

   Safety and Tolerability of the Anxiolytic and Nootropic Drug Phenibut: A Systematic Review of Clinical Trials and Case Reports.

   Kupats E, Vrublevska J, Zvejniece B et al. · Pharmacopsychiatry · 2020

   Systematic review of clinical-trial safety reports and dependence/intoxication case reports. A review is secondary evidence and includes heterogeneous exposures.

   PMID 32340063 · DOI: 10.1055/a-1151-5017

2. Review · secondary evidence

   Phenibut: A drug with one too many "buts".

   Gurley BJ, Koturbash I · Basic & clinical pharmacology & toxicology · 2024

   PMID 39197876 · DOI: 10.1111/bcpt.14075

Phenibut FAA Powder supplier sources

Scientific sources describe molecules and experiments. The commercial links below identify recorded supplier packages. A publication or chemical database entry does not verify the seller, purity, sterility or contents of a lot. Some links are affiliate links; see our disclosure.

Phenibut FAA Powder for sale: compare prices, sizes and forms from every tracked supplier →

Reference sources & further reading

• PubChem compound record 14113 — chemical identity and structure.
• Wikipedia: Phenibut — Background encyclopedia; not a primary clinical source.
• Grokipedia: Phenibut — Background encyclopedia; not a primary clinical source.

The citations above link directly to publication records. Encyclopedia links are background reading and are not used to establish clinical effectiveness.

Research information is not a dosing guide or a recommendation for personal use. Study findings are specific to the formulation, population and methods tested. Read our source and correction policy.

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