Warfarin
Last updated: Tuesday, 30, March, 2004
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| Item | Process |
|---|---|
| Specimen | 5 mL blood in EDTA tube. |
| Method | HPLC. |
| Application | Documentation of accidental or intentional overdose (including some rat poisons). This test is not used for monitoring oral anticoagulant therapy; see International normalised ratio. Occasionally helpful to document lack of compliance with warfarin therapy. |
| Interpretation | The presence of warfarin indicates ingestion has occurred. |
| Reference | Kelly JC and O’Malley K. Clin Pharmacokinet 1979; 4: 1-15. |