A patient on aspirin will have increase in :

Antiplatelet drugs (like aspirin and clopidogrel) prolong the bleeding time. AnticoaguIant drugs prolong the clotting time. Drugs interfering with Intrinsic pathway (like heparin) prolong the aPTT Drugs Interfering with extrinsic pathway (like warfarin) prolong the PT Thrombin time is prolonged in cases of afibrinogenemia and dysfibrinogenemia.