- Ongoing risk for bleeding due to active peptic ulcer disease or bleeding diathesis or requirement for systemic anticoagulation with unfractionated heparin, low-molecular-weight heparin or heparin fractions (eg, enoxaparin, dalteparin, fondaparinux) or oral anticoagulants (eg, apixaban, rivaroxaban, dabigatran etexilate, warfarin). Note: Use of heparin or thrombolytic agents for local maintenance or clearance of a central venous catheter is permitted.