Phenibut - Erowid Exp - 'A Nootropic, Stimulant, and Depressant'An Experience with Phenibut. 'A Nootropic, Stimulant, and Depressant' by The Errant Boatman#dose-response#reduction#hallucinogenic.#brain·erowid.org·Dec 19, 2021Phenibut - Erowid Exp - 'A Nootropic, Stimulant, and Depressant'