Pharmacology Respiratory system 0251e8a6 Anticoagulant effect of warfarin bus increased by all and the following A Cimetidine B Phytonadione C Amiodarine D Phenyl butazone High-Yield Explanation Refer KDT 6/e p 602 Vitamin K1 (phytonadione) is the antidote of warfarin It decreases the effect of oral anticoagulants