ArticleJournal of medical toxicology : official journal of the American College of Medical Toxicology2026
Apixaban Overdose with Massive Bleeding and Anti-Xa Levels.
Article in Journal of medical toxicology : official journal of the American College of Medical Toxicology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionWhile use of factor Xa inhibitors has increased, there are relatively few cases of overdose reported. Clinically relevant bleeding is often absent, and the behavior of drug levels in overdose is not fully agreed on. CASE REPORT: A 70-year-old male presented after a polysubstance overdose including at least 250 mg of apixaban with massive gastrointestinal (GI) hemorrhage and parafalcine and tentorial subdural hematoma. He was treated with 1 gram tranexamic acid (TXA), anti-inhibitor coagulant complex (FEIBA), and massive transfusion. No further episodes of bleeding were observed. Anti-Xa levels were trended until undetectable. DISCUSSION: Bleeding from an overdose of factor Xa inhibitors is a relatively rare occurrence; however, this case illustrates that life threatening hemorrhage can occur and may require aggressive supportive care. Anti-Xa levels demonstrated a first order pattern of elimination even at markedly supratherapeutic concentrations, consistent with several prior case reports.
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