Phenibut is used for anxiety, fear, trouble sleeping (insomnia), tension, stress, fatigue, post-traumatic stress disorder (PTSD), depression, alcoholism, and irregular heartbeat. It is also used to improve memory, learning, and thinking. https://www.mediafire.com/file/qiulzh57shrpn3e/Pre+Workout+Supplement+-+The+Best+Muscle+Building+Supplement4.pdf/file