NEW BERLIN - Energy drinks are all the rage these days, especially among young people who can just pick up a can in a convenience store. But one local mom says her son over-dosed on the drinks, putting him in the hospital. Sixteen-year-old Jack Borgardt will never forget the day he overdosed. “I was really scared. I thought I was going to die,” Borgardt said. It was exam time. “I was very pressured to do a lot of homework and I was very tired from the previous nights,” Borgardt explained. He cracked open an energy drink...the first of seven in just 24 hours...too much for his body to handle. “I had horrible chest pain, like I could barely breathe, and my head was just throbbing, and I lost my vision for a little while. I was driving home from a workout and I couldn't see,” Borgardt said. “By the time he came back home he had this massive, excruciating headache. I mean he was literally thrashing around he was in so much pain,” Jack’s mom Tracy said. Terrified, Tracy rushed her son to Children's Hospital. The diagnosis: caffeine poisoning. Very rare. TODAY’S TMJ4’s Shelley Walcott: “Can it kill you?” “The basic tenet of toxicology is that the dose is the poison. Anything in a high enough dose can be dangerous,” Dr. Mark Kostic from the Wisconsin Poison Center said. Jack recovered, but has lingering effects: “I still have migraines, my eyesight's really bad, it's really blurry, and my head's just throbbing all the time,” Borgardt said. Shelley Walcott: “Even right now?” “Yeah, right now I have a bad headache,” Borgardt said. “I’m not an expert on them, but I know he had too many. It was not good for him and this was the result,” Tracy said. Jack says he's never having any energy drinks again; he won't even drink caffeine now that he knows the damage it can do. Doctors say energy drinks are not considered dangerous. Like anything else, they need to be taken in moderation.