How does Phenibut work?

How does Phenibut work?

Phenibut is a chemical similar to a brain chemical called gamma-aminobutyric acid (GABA). It is used as medicine.
Phenibut is used for anxiety, fear, trouble sleeping (insomnia), tension, stress, fatigue, post-traumatic stress disorder, depression, alcoholism, and irregular heartbeat. It is also used for improving memory, learning, and thinking.
Phenibut is similar to the brain chemical called gamma-aminobutyric acid (GABA). Research in animals shows that it might decrease anxiety and have other effects on the body. But phenibut has not been studied in people, so no one knows whether it might work as a medicine.