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Phenibut: Review and Pharmacologic Approaches to Treating Withdrawal
Scott R Penzak1, Marilyn Bulloch1
1Department of Pharmacy Practice, Harrison College of Pharmacy, Auburn University, Auburn, AL, USA.
Phenibut, a GABA analog, is increasingly causing intoxication and withdrawal. Baclofen, benzodiazepines, and phenobarbital effectively treat withdrawal symptoms, with phenobarbital recommended for seizure risk.
Area of Science:
- Neuroscience
- Pharmacology
- Toxicology
Background:
- Phenibut (β-Phenyl-γ-aminobutyric acid) is a GABA analog marketed as a nootropic.
- Its legal status and online availability contribute to rising intoxication and withdrawal cases.
Purpose of the Study:
- To review phenibut's pharmacology, intoxication, and withdrawal management.
- To emphasize treatment strategies for acute phenibut withdrawal due to lack of comparative studies.
Main Methods:
- Review of existing literature on phenibut.
- Analysis of 29 case reports of phenibut withdrawal.
Main Results:
- Successful treatment of phenibut withdrawal using baclofen, benzodiazepines, and phenobarbital, individually or combined.
- Ancillary medications included antipsychotics, dexmedetomidine, gabapentin, and pregabalin.
- Baclofen or benzodiazepine/phenobarbital tapers were used for weaning; phenobarbital is preferred for seizure risk.
Conclusions:
- Phenibut intoxication and withdrawal are likely to increase with its continued legal availability.
- Accurate medication history is crucial for diagnosis due to limited drug screening.
- Consultation with addiction specialists or toxicologists is advised for complex cases.
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