An "anti-energy" drink is being blamed for making middle-school students vomit and act lethargic.

Some students from William R. Satz school in Holmdel, N.J., were reportedly sickened after they purchased Marley's Mellow Mood from their cafeteria and drank it, according to WNYW. Symptoms included vomiting, splitting headaches and feeling drowsy.

"It was like a zombiefest," one student told the news station.