F-Phenibut (Fluoro Phenibut, 4 Fluorophenyl, 4 amino 3) is a central nervous system depressant and a GABA B receptor agonist that is more potent than the GABA derivative, Phenibut.
 

Fluorophenyl butanoic acid is a depressant belonging to the chemical class of Gabapentinoid that has similar tranquilizing effects to other nootropics and has a five to ten-fold higher potency making it a viable option. Phenibut powder interacts with the central nervous system and lowers the over-excitement levels in the brain. Although Fluorophenibut works similarly to Phenibut, it has a shorter duration in the body compared to Phenibut half-life. It is a derivative substance of GABA B only that it can cross the blood-brain barrier because of the phenyl ring.

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