Most energy drinks contain a number of substances, including large amounts of sugar and caffeine, which can provide a temporary energy boost. The boost is short-lived, however, and may be accompanied by other problems.
For example, energy drinks that contain sugar may contribute to weight gain, and too much caffeine can lead to nervousness, irritability, insomnia, rapid heart beat and increased blood pressure.
Mixing energy drinks with alcohol may be even more problematic. Energy drinks can blunt the feeling of intoxication, which may lead to heavier drinking and alcohol-related injuries.
For most people, occasional energy drinks are fine. If you’re consistently fatigued or rundown, however, consider a better and healthier way to boost your energy. Get adequate sleep, include physical activity in your daily routine and eat a healthy diet. If these strategies don’t seem to help,
Consult your doctor. Sometimes fatigue is a sign of an underlying medical condition, such as hypothyroidism or anemia.