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Laboratory assessment of rivaroxaban: a review

Meyer Michel Samama1, Geneviève Contant, Theodore E Spiro

  • 1Hôtel-Dieu University Hospital, 1 place du Paris Notre-Dame, Paris 75004, 4ème, Paris, France. meyermichel.samama@biomnis.com.

Thrombosis Journal
|July 5, 2013
PubMed

Insights

Rivaroxaban, a direct Factor Xa inhibitor, effectively manages thromboembolic disorders with fixed doses. Anti-Factor Xa assays can measure drug levels when needed, but results require careful interpretation alongside patient factors.

Area of Science:

  • Pharmacology
  • Hematology
  • Clinical Medicine

Background:

  • Thromboembolic disorders necessitate effective anticoagulation.
  • Targeting specific coagulation enzymes like Factor Xa offers a therapeutic strategy.
  • Rivaroxaban, a direct Factor Xa inhibitor, has demonstrated efficacy in clinical trials.

Purpose of the Study:

  • To review the role and application of rivaroxaban in managing thromboembolic disorders.
  • To discuss the utility and interpretation of anti-Factor Xa assays for assessing rivaroxaban exposure.
  • To highlight considerations for clinicians when interpreting assay results.

Main Methods:

  • Review of phase III clinical trial data for rivaroxaban.
  • Discussion of pharmacokinetic and pharmacodynamic properties of rivaroxaban.
  • Explanation of anti-Factor Xa chromogenic assays and their calibration.

Main Results:

  • Rivaroxaban is approved for managing several thromboembolic disorders.
  • Fixed-dose regimens are generally used without routine coagulation monitoring.
  • Anti-Factor Xa assays can quantify rivaroxaban levels, aiding exposure assessment.

Conclusions:

  • Rivaroxaban offers a predictable anticoagulant profile suitable for fixed dosing.
  • Interpretation of anti-Factor Xa assay results requires consideration of sampling time and patient-specific bleeding risks.
  • Assays measure drug concentration, not anticoagulant activity intensity, necessitating clinical correlation.

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