Phenibut isn't really a new drug. It is an old one making a comeback. A girl in my class was absent today with vomiting and dizziness. Phenibut is legal and doesn't require a prescription. It has a long half-life and can take days to get out of the system. It is highly addictive. At first, the side effects are wonderful--sleep, relaxation, no more social anxiety, more pleasant attitude, energy, enhanced concentration, aphrodisiac, headache reliever, fibromyalgia reliever, and appetite suppressant. Sounds great, right? Then comes the vomiting, dizziness, and diarrhea for the next few days. It is like a hangover times a billion that won't go away.