True about oral anticoagulant warfarin are all EXCEPT:
High-Yield Explanation
* Oral anticoagulant is warfarin. It is used only in vivo (body), not in vitro (lab).* Warfarin is not used to store blood.* It acts by inhibiting Vitamin K. Due to overdose, hematuria is the first manifestation noted.* Dose monitoring is done by INR.* Antidote of warfarin overdose: Vitamin KPT (Prothrombin Time)aPTT (activated Partial Thromboplastin Time)Assess activity of Extrinsic coagulation pathway Used when on warfarin treatmentWePT: Warfarin for extrinsic; PT value assessed.Assess activity of Extrinsic coagulation pathway.Used while on heparin treatment.HINT: Heparin for Intrinsic; aPTT value assessed.