Two weeks after Matthew Spencer got a spinal injection for his chronic back pain, he felt "not quite right." Nothing too specific: worsening headache, nausea.
The Food and Drug Administration has confirmed that it received five reports in the past past three years suggesting that people died after drinking caffeinated energy drinks.
But the agency also cautions that these reports do not add up to proof that the beverages actually caused those deaths. These reports — called adverse event reports — are considered unconfirmed allegations, and the FDA doesn't usually release them.