Caution should be employed when Xigris is used with other drugs that affect haemostasis (see sections 4.3 and 4.4) including Protein C, thrombolytics (e. g. streptokinase, tPA, rPA and urokinase), oral anticoagulants (e. g. warfarin), hirudins, antithrombin, aspirin and other anti platelets agents, e. g. non- steroidal anti-inflammatory drugs, ticlopidine and clopidogrel, glycoprotein IIb/ IIIa antagonists (such as abciximab, eptifibatide, tirofiban) and prostacyclins such as iloprost.