01
Fill in the blank
1 point
Warfarin is an oral .
Free Practice Quiz Question List
3 Warfarin Therapy Online Quiz Questions
Use this free practice quiz with 20 questions to review 3 Warfarin Therapy, test your knowledge, and prepare for your next test or exam.
20 questions
02
Written response
1 point
A care team member documents the standardized measure of clotting time used to guide warfarin dosing. What abbreviation names this measure?
03
True or false
1 point
A patient taking warfarin should generally keep their intake of vitamin K-rich foods reasonably consistent rather than eliminate those foods.
- A
True
- B
False
04
Fill in the blank
1 point
Even when feeling well, a patient taking warfarin should keep their .
05
True or false
1 point
A patient should independently change their warfarin dose whenever an INR result seems outside the usual range.
- A
True
- B
False
06
Written response
1 point
What is a common target INR range for warfarin treatment of atrial fibrillation or venous thromboembolism? Enter the lower and upper limits separated by an en dash. This is a common range, not a universal target for every indication.
07
Choose one
1 point
A patient realizes the day after that they missed a warfarin dose. What is the safest general advice?
- A
Take two doses now to make up for the missed dose.
- B
Do not double the dose; follow the prescriber's missed-dose instructions or contact the anticoagulation service.
- C
Stop warfarin until the next INR test.
- D
Take an extra dose only if there are no symptoms.
08
Choose one
1 point
A patient whose prescribed target INR is 2.0–3.0 has a result of 1.6. Which interpretation and next step are most appropriate?
- A
The INR is within the stated target, so no follow-up is needed.
- B
The INR is above the stated target, so the patient should skip the next dose.
- C
The INR is below the stated target; report it to the anticoagulation service and do not self-adjust the dose.
- D
The INR is below the stated target; take an extra dose immediately.
09
Choose one
1 point
A patient with a usual target INR of 2.0–3.0 has an INR of 4.8 but no bleeding. What is the best general approach?
- A
Take vitamin K immediately, because it is routinely required for every elevated INR.
- B
Contact the clinician or anticoagulation service; the clinician may adjust or hold warfarin and arrange follow-up testing.
- C
Take an extra warfarin dose to bring the INR back into range.
- D
Ignore the result because there is no bleeding.
10
Choose all
1 point
A patient taking warfarin plans to start an antibiotic and a vitamin K supplement and to avoid all leafy greens. Select all appropriate actions.
- A
Contact the prescriber or pharmacist before starting the antibiotic or vitamin K supplement.
- B
Start both products without consultation as long as the patient feels well.
- C
Discuss the planned diet change with the care team before making it.
- D
Eliminate all leafy greens without telling the care team.
11
Choose all
1 point
Which situations require emergency care for a patient taking warfarin? Select all that apply.
- A
Major or uncontrolled bleeding
- B
Black or bloody stools
- C
Unusual bruising without other symptoms
- D
A head injury or fall, especially if the head was struck
12
Open ended
1 point
A patient taking warfarin asks how to reduce everyday bleeding risks. Give one sensible grooming precaution and explain what they should do before taking an over-the-counter pain medicine.
13
True or false
1 point
For life-threatening warfarin-related bleeding, plasma may be used when four-factor prothrombin complex concentrate is unavailable.
- A
True
- B
False
14
Choose one
1 point
A patient taking warfarin develops life-threatening bleeding. Which general reversal strategy is appropriate?
- A
Continue warfarin and wait for the next scheduled INR test.
- B
Give oral vitamin K at home and manage the bleeding without emergency care.
- C
Treat it as an emergency; clinicians generally stop warfarin and use four-factor prothrombin complex concentrate with intravenous vitamin K for rapid reversal.
- D
Use vitamin K alone in every case and do not treat the bleeding source.
15
Choose one
1 point
A patient taking warfarin plans to stop eating leafy greens because they contain vitamin K. What is the best counseling?
- A
Avoid all foods that contain vitamin K.
- B
Keep vitamin K intake reasonably consistent rather than eliminating leafy greens.
- C
Increase leafy-green intake sharply to prevent bleeding.
- D
Change the warfarin dose whenever the diet changes.
16
Choose one
1 point
A patient taking warfarin realizes the next day that they missed a dose. What should they do?
- A
Take two doses as soon as the missed dose is remembered.
- B
Skip all remaining doses until the next INR test.
- C
Do not double the dose; follow the prescriber's missed-dose instructions or contact the anticoagulation service.
- D
Take an extra dose only if there are no symptoms.
17
Choose one
1 point
A patient taking warfarin is prescribed a new antibiotic and is considering a vitamin K supplement. What is the safest next step?
- A
Contact the prescriber or pharmacist before starting either, and discuss whether closer INR monitoring is needed.
- B
Start both, but skip the next scheduled INR test.
- C
Start the antibiotic and stop warfarin until the course is finished.
- D
Begin the supplement and double the warfarin dose to offset it.
18
Choose one
1 point
A patient's prescribed INR target is 2.0–3.0, and their result is 1.6. What does this suggest, and what is the appropriate response?
- A
The INR is above target, so the patient should stop warfarin without calling anyone.
- B
The INR is below the prescribed range; report it to the anticoagulation service and do not take an extra dose independently.
- C
The INR is in range, so no follow-up is needed.
- D
The result proves that the patient has a blood clot and should take vitamin K.
19
Written response
1 point
What standardized measure of blood-clotting time is used to guide warfarin dosing?
20
Written response
1 point
What standard abbreviation identifies the prothrombin complex concentrate generally used with intravenous vitamin K for rapid reversal of life-threatening warfarin-related bleeding?
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