A laboratory test used to best measure the effectiveness of warfarin sodium therapy is known as
1. complete blood count.
2. platelet count.
3. aPtt.
4. international normalized ratio (INR).
4
Rationale 1: Complete blood count is not necessary for this drug.
Rationale 2: Platelet count is not necessary for this drug.
Rationale 3: aPtt is the best laboratory test for heparin therapy.
Rationale 4: INR is the best and most effective test for warfarin therapy.
Global Rationale: INR is the best and most effective test for warfarin therapy. Complete blood count is not necessary for this drug. Platelet count is not necessary for this drug. aPtt is the best laboratory test for heparin therapy.
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