Fenibut

Phenibut is a depressant and anxiolytic of the gabapentinoid class, structurally derived from the neurotransmitter GABA. Developed in the Soviet Union during the 1960s under Professor V. V. Perekalin, it remains a prescribed pharmaceutical in Russia for conditions including anxiety, insomnia, depression, and PTSD. Outside Russia, it is unapproved for clinical use and typically sold as a nutritional supplement. At common doses, it is noted for producing less drowsiness than other GABAergic substances such as benzodiazepines.

Also known as: Phgaba, Noofen, Bifren, Fenibut, Anvifen

Classification

Chemical: Gabapentinoid
Psychoactive: Depressant
Psychoactive: Nootropic
Tag: Anxiolytic
Tag: GABA analogue
Tag: GABAergic
Tag: Habit-Forming
Tag: Research-Chemical

Effects

Stimulation And Sedation
Respiratory Depression
Nausea
Increased Perspiration
Stomach Cramps
Headache
Empathy Love And Sociability Enhancement
Information Processing Suppression
Thought Deceleration
Cognitive Euphoria
Motivation Enhancement
Anxiety Suppression
Disinhibition
Dehydration
Appetite Enhancement
Dulled Perception
Open Eye Visuals
Blurred Vision

Routes of Administration

Oral

Dosage

Heavy: 3.5 g
Light: 0.5-1 g
Common: 1-2 g
Strong: 2-3.5 g
Threshold: 0.25 g

Duration

Onset: 1.5-3 h
Comeup: 1.5-3 h
Peak: 3-4 h
Offset: 4-6 h
After Effects: 6-24 h

Harm Reduction

Check interactions before mixing substances, pay attention to dose spacing and hydration, and treat all dosage guidance as approximate rather than guaranteed safe.

Sources

Substance data is aggregated from the following public harm-reduction and reference sources.

Links

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