Love that kick you get when you drink those energy drinks? Well, research indicates that the boost may pose a health risk to those who have high blood pressure or other cardiovascular diseases. These drinks contain lots of caffeine and also an amino acid taurine which is found to increase heart rate. Youngsters often take a lot of these to enable them to party and stay awake all night. When taken with alcohol, it increases the risk for arrhythmia (disordered rhythm for heart beat) which can be fatal.