What is the duration of action for Adenosine?

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Study for the Paramedic Pharmacology Test. Prepare with flashcards and multiple-choice questions, each offering hints and explanations. Master the material and ace your exam!

Multiple Choice

What is the duration of action for Adenosine?

Explanation:
Adenosine acts for a very short time because it is cleared from the blood incredibly quickly. Its half-life is only a few seconds, so the therapeutic effect—transiently blocking conduction through the AV node to interrupt a reentrant tachycardia—lasts roughly one to two minutes. That rapid clearance is why the drug is given as a rapid IV push with a saline flush and why its action ends so quickly. Longer durations would not fit its pharmacokinetic profile, which is characterized by fast metabolism and short duration of action.

Adenosine acts for a very short time because it is cleared from the blood incredibly quickly. Its half-life is only a few seconds, so the therapeutic effect—transiently blocking conduction through the AV node to interrupt a reentrant tachycardia—lasts roughly one to two minutes. That rapid clearance is why the drug is given as a rapid IV push with a saline flush and why its action ends so quickly. Longer durations would not fit its pharmacokinetic profile, which is characterized by fast metabolism and short duration of action.

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