A patient is receiving warfarin (Coumadin), which is 98% bound to plasma proteins. The antidepressant paroxetine (Paxil), which is 95% bound to plasma proteins, is added to the patient's daily medication. If the paroxetine displaces warfarin from its protein binding sites, which of the following will most likely to occur?
Diminished effect from warfarin
Diminished effect from paroxetine
Increased effect, and toxicity from paroxetine
Increased effect, and toxicity from warfarin
The Correct Answer is D
A. Diminished effect from warfarin: This is unlikely because displacement of warfarin from protein binding sites would increase its concentration in the bloodstream, potentially leading to increased anticoagulant effects and toxicity.
B. Diminished effect from paroxetine: This is also unlikely because displacement of paroxetine from protein binding sites would increase its concentration in the bloodstream, potentially leading to increased pharmacological effects and toxicity.
C. Increased effect, and toxicity from paroxetine: If paroxetine displaces warfarin from protein binding sites, it can increase the concentration of free warfarin in the bloodstream, leading to increased anticoagulant effects and potential toxicity.
D. Increased effect, and toxicity from warfarin: Correct. If warfarin is displaced from protein binding sites by paroxetine, it can increase the concentration of free warfarin in the bloodstream, leading to increased anticoagulant effects and potential toxicity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
To determine how many tablets of digoxin 0.125 mg are needed to administer a total dose of 0.25 mg, divide the desired dose by the dose per tablet:
0.25 mg (desired dose) ÷ 0.125 mg (dose per tablet) = 2 tablets
Therefore, the nurse should administer 2 tablets of digoxin 0.125 mg to the client to achieve a total dose of 0.25 mg.
Correct Answer is D
Explanation
A. Temperature of 100.8 Degrees Fahrenheit (38.2 Degrees Celsius): Fever can indicate a potential adverse reaction to the medication or may be a sign of infection, which could complicate the patient's condition. While a fever can be a sign of an infection, it's not a typical adverse effect for alteplase
B. Skin rash with urticaria: Skin rash and urticaria (hives) can indicate an allergic reaction to alteplase. Allergic reactions can range from mild to severe and may necessitate discontinuation of the medication and administration of appropriate treatment, such as antihistamines or corticosteroids, depending on the severity of the reaction but it's less common than bleeding.
C. Wheezing with labored breathing: Wheezing and labored breathing can indicate a severe allergic reaction or anaphylaxis to alteplase but again, bleeding is a more prominent concern.
D. Bruising and epistaxis: Alteplase increases the risk of bleeding due to its thrombolytic activity. Bruising and epistaxis (nosebleeds) are common manifestations of bleeding associated with alteplase therapy. Monitoring for these signs helps detect potential bleeding complications early, allowing for prompt intervention to minimize further bleeding and manage the patient's condition appropriately.
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