Federal officials have received reports of 13 deaths over the last four years that cited the possible involvement of 5-Hour Energy, a highly caffeinated energy shot, according to Food and Drug Administration records and an interview with an agency official.
The disclosure of the reports is the second time in recent weeks that F.D.A. filings citing energy drinks and deaths have emerged. Last month, the agency acknowledged it had received five fatality filings mentioning another popular energy drink, Monster Energy.
Since 2009, 5-Hour Energy has been mentioned in some 90 filings with the F.D.A., including more than 30 that involved serious or life-threatening injuries like heart attacks, convulsions and, in one case, a spontaneous abortion, a summary of F.D.A. records reviewed by The New York Times showed.
The filing of an incident report with the F.D.A. does not mean that a product was responsible for a death or an injury or contributed in any way to it. Such reports can be fragmentary in nature and difficult to investigate.
The fast-growing energy drink industry is facing increasing scrutiny over issues like labeling disclosures and possible health risks. Some lawmakers are calling on the F.D.A. to increase its regulation of the products and the New York State attorney general is investigating the practices of several producers.
Unlike Red Bull, Monster Energy and some other energy drinks that look like beverages, 5-Hour Energy is sold in a two-ounce bottle referred to as a shot. The company does not disclose the amount of caffeine in each bottle, but a recent article published by Consumer Reports placed that level at about 215 milligrams.
An eight-ounce cup of coffee, depending on how it is made, can contain from 100 to 150 milligrams of caffeine.
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