Anticoagulant effect of warfarin bus increased by all and the following: (A) Cimetidine, (B) Phytonadione, (C) Amiodarine, (D) Phenyl butazone
Answer is B. Refer KDT 6/e p 602 Vitamin K1 (phytonadione) is the antidote of warfarin It decreases the effect of oral anticoagulants