Energy drinks are beverages like :
- Red Bull,
- Adrenaline Rush,
- ISO Sprint, and
which contain large doses of caffeine and other legal stimulants like ephedrine, guarana, and ginseng. Energy drinks may contain as much as 80 mg of caffeine, the equivalent of a cup of coffee. Compared to the 37 mg. of caffeine in a Mountain Dew, or the 23 mg. in a Coca-Cola Classic, that's a big punch. These energy drinks are marketed to people under 30, especially to college students, and are widely available both on and off campus.