How long should anticoagulation be continued in a patient after a DVT?
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Anticoagulation treatment of a primary deep vein thrombosis (DVT) should continue for at least 3 months (SOR: A, meta-analysis). In patients with a second unprovoked DVT and a low to moderate bleeding risk, extended therapy of longer than 3 months should be considered. Patients with cancer should receive extended therapy, preferably with low-molecular-weight heparin (LMWH), regardless of bleed risk (SOR: B, evidence-based guideline).
Evidence Based Practice 16(8): 08.