Phenibut Was made in Russia in the 60’s by a group of medical scientists and was subsequently utilised in a “Russian cosmonaut’s medkit,” (1) for its probable intention of offering that the cosmonaut with relief from stress and anxiety. It’s marketed in the U.S. as a dietary supplement but is a presciption medicine in Russia. Phenibut is known to be able to increase brain functions and previously was used to treat stress related ailments. Tolerance was reported pertaining to the usage of Phenibut, so it would be smart to take it intermittently rather than daily. For some, 1 week off and one week on, would be nice but again, it can become habitual so it’s important to proceed with caution here.