asmi
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A pt with prosthetic heart valve was on warfarin.He had received antibiotics for 1 week,following which his INR raised to 5.5 .The antibiotic which was given is most likely to be :
A. ampicillin
B. nitrofurantion
c.norfloxacin
d.cefalexin
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| mjl1717
Forum Hero
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norfloxacin
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Smell the coffee! "Is That an Osler move??"
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| usmleasr
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:roll: please explain
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| asmi
Forum Hero
Topics: 1043
Posts: 4,609
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correct 
macrolides,metronidazole ,sulfonamides,norfloxacin all can potentiate the effect of warfarin via P450 system .
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