The Food and Drug Administration (FDA) is currently investigating whether 5-Hour ENERGY shots are the cause of 13 reported deaths, and several hospitalizations. Because 5-Hour Energy is a dietary supplement, they are not legally required to disclose how much caffeine their product contains. However, a recent lab report by ConsumerLab.com placed the level at 215 mg per 2oz bottle - whereas a typical cup of coffee ranges anywhere from 100-150mg per 8oz.
The company cautions users to only take the product twice a day, several hours apart on the product labeling. They also recommend not using the product while pregnant or under the age of 12. However, even when used as recommended, individuals with caffeine sensitivities and health issues (such as heart conditions) should consider avoiding use of the product altogether.
Anyone can report adverse effects of a product, and the FDA has to thoroughly investigate every claim. In fact, the FDA is required by law to look into reported deaths related to food and drug products. However, because of the nature of the reports, some of the information is limited which makes them difficult to investigate and the filing of an incident report does not mean a product is the actual cause of any health issue - until otherwise determined by the FDA.
The FDA is still investigating the cause of the 13 deaths reportedly linked to 5-Hour Energy. Whether or not health conditions may have caused the adverse effect is still under scrutiny.