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Dietary supplements and their associated adverse events are not uncommon in the U.S. military, and selected dietary supplements have been associated with a number of nontraumatic deaths in service members. Specific ingredients and dietary supplement products in the civilian community are often associated with multiple adverse events and some have subsequently been removed from the marketplace; the most notable in the last decade is ephedra. We present case reports for two soldiers who were taking commercially available dietary supplements containing multiple ingredients to include the sympathomimetic, 1,3-dimethylamylamine (DMAA); both collapsed during physical exertion from cardiac arrest and ultimately died. A presentation of their clinical courses and a discussion of the history and pharmacology of dietary supplement ingredients, including DMAA, are provided. Our cases highlight concerns that DMAA in combination with other ingredients may be associated with significant consequences, reminiscent of previous adverse events from other sympathomimetic drugs previously removed from the market.

Case Reports: Death of Active Duty Soldiers Following Ingestion of Dietary Supplements Containing 1,3-Dimethylamylamine (DMAA)