Are energy drinks harmful?
Large amounts of caffeine may cause serious heart and blood vessel problems such as heart rhythm disturbances and increases in heart rate and blood pressure. Caffeine also may harm children's still-developing cardiovascular and nervous systems. What are the negative effects of energy drinks? You may experience the negative effects of energy drinks after your first sip.
You may notice your heart rate increase and stress levels rise. Consuming excessive amounts of caffeine can cause anxiety, restlessness, and trouble sleeping.