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Energy Drink-related Supraventricular Tachycardia

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Discussion

Many “energy drinks” contain excessive amounts of caffeine, sometimes several times the amount contained in a cup of coffee.1 Caffeine is the natural alkaloid methylxanthine, which is 99% absorbed after oral ingestion.1 The blood concentration peaks 1 to 1.5 hours after ingestion, with a half-life of 3 to 6 hours. Caffeine is metabolized by the P450 hepatic enzyme system.1 At high serum levels, enzyme saturation occurs and elimination follows zero-order kinetics, with constant elimination

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    Caffeine-induced cardiac arrhythmia: an unrecognised danger of healthfood products

    Med J Aust

    (2001)
  • E. Delacrétaz

    Supraventricular tachycardia

    N Engl J Med

    (2006)
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