Warfarin Flashcards by Sherilyn Chew

Q

Alcohol

interaction with warfarin

A

Decreases effect

CYP450 inducer

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Q

Carbamazepine

interaction with warfarin

A

Decreases effect

CYP450 inducer

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Q

Phenytoin

interaction with warfarin

A

Decreases effect

CYP450 inducer

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Q

Cranberry juice

interaction with warfarin

A

Increases effect

enzyme inhibitor

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Q

St John’s wort

interaction with warfarin

A

Decreases effect

CYP450 inducer

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Q

Clarithromycin/ Erythromycin

interaction with warfarin

A

Increases effect

enzyme inhibitor

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Q

Signs of poor anticoagulation control

A

2 INR >5 in past 6 months
1 INR >8 in past 6 months
2 INR <1.6 in past 6 months
Total therapeutic range <65%

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Q

Target INR for A fib/ MI

A

2.5

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Q

Target INR for prosthetic heart valves

A

3.5

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