have noticed a lot of young people drinking quite a bit of these energy drinks along with strong alcohol such as Jagermeister and have noticed quite a few mostly young inexperienced young truck drivers slamming it down before and while driving more often at night.

"Drink more than one and you get lots of sugar — 14 teaspoons in two cans, 21 teaspoons in three," she said. Add in megadoses of some vitamins; unnecessary nutrients (taurine) and more caffeine than plain sodas and you get "a fast up-and-down sugar high and a really rough caffeine buzz," she said. "And drinking two or three cans a day for a period of weeks or months might trigger some side effects from the vitamin megadoses."

Caffeine-stoked energy drinks worry Docs - Yahoo! News