Tags: Drug.
β-Phenyl-γ-aminobutyric acid (brand name Noofen) better known as phenibut or less commonly fenibut or phenybut is a derivative of the naturally occurring inhibitory neurotransmitter γ-aminobutyric acid (GABA). The addition of a phenyl ring allows phenibut to cross the blood brain barrier. Phenibut is sold as a nutritional supplement and is not approved as a pharmaceutical in the United States or Europe but in Russia it is sold as a psychotropic drug.
