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Questions and Answers
What is the mechanism of acetylsalicylic acid (aspirin) in anti-platelet therapy?
What is the mechanism of acetylsalicylic acid (aspirin) in anti-platelet therapy?
How many mechanisms do anti-platelet drugs work on?
How many mechanisms do anti-platelet drugs work on?
What is the target of P2Y12 antagonists in anti-platelet therapy?
What is the target of P2Y12 antagonists in anti-platelet therapy?
GPIIb/IIIa inhibitors have how many effects in anti-platelet therapy?
GPIIb/IIIa inhibitors have how many effects in anti-platelet therapy?
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What is the overall goal of anti-platelet therapy?
What is the overall goal of anti-platelet therapy?
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What is the primary benefit of anti-platelet therapy in patients with prosthetic heart valves?
What is the primary benefit of anti-platelet therapy in patients with prosthetic heart valves?
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In which type of patients is anti-platelet therapy particularly important?
In which type of patients is anti-platelet therapy particularly important?
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What is the consequence of inadequate anti-platelet therapy in patients with prosthetic heart valves?
What is the consequence of inadequate anti-platelet therapy in patients with prosthetic heart valves?
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What is the primary goal of anti-platelet therapy in patients with prosthetic heart valves?
What is the primary goal of anti-platelet therapy in patients with prosthetic heart valves?
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Why is anti-platelet therapy important in patients with prosthetic heart valves?
Why is anti-platelet therapy important in patients with prosthetic heart valves?
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What is the classification of Dipyridamole?
What is the classification of Dipyridamole?
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What is the purpose of Dipyridamole?
What is the purpose of Dipyridamole?
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Which of the following is NOT a characteristic of Dipyridamole?
Which of the following is NOT a characteristic of Dipyridamole?
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What is the effect of Dipyridamole on platelet activity?
What is the effect of Dipyridamole on platelet activity?
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What type of medication is Dipyridamole?
What type of medication is Dipyridamole?
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What is the optimal dose of the medication?
What is the optimal dose of the medication?
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What is the effect of high doses of the medication on COX-2?
What is the effect of high doses of the medication on COX-2?
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Why are higher doses of the medication potentially less efficacious?
Why are higher doses of the medication potentially less efficacious?
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What is the effect of higher doses of the medication on toxicity?
What is the effect of higher doses of the medication on toxicity?
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What is prostacyclin responsible for?
What is prostacyclin responsible for?
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What is a common adverse effect of Ticlopidine?
What is a common adverse effect of Ticlopidine?
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What is the dose of Ticlopidine?
What is the dose of Ticlopidine?
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Which of the following is NOT an adverse effect of Ticlopidine?
Which of the following is NOT an adverse effect of Ticlopidine?
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What class of anti-platelet drugs do Ticlopidine and Clopidogrel belong to?
What class of anti-platelet drugs do Ticlopidine and Clopidogrel belong to?
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Which of the following is a safer option than Ticlopidine?
Which of the following is a safer option than Ticlopidine?
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Study Notes
Anti-Platelet Drugs
- To give anti-platelet drugs, four mechanisms are targeted:
- Acetylsalicylic acid (aspirin) as an inhibitor of Thromboxane A2
- P2Y12 antagonists
- GPIIb/IIIa antagonists
- Dipyridamole
Mechanism of Acetylsalicylic Acid (Aspirin)
- Works as an inhibitor of Thromboxane A2
- At high doses (1g/d), also inhibits COX-2, responsible for synthesizing prostacyclin
- High doses are potentially less efficacious and increase toxicity, especially bleeding
- In patients with prosthetic valves, it inhibits embolization
Comparing Clopidogrel and Ticlopidine
- Clopidogrel is safer than Ticlopidine
- Ticlopidine has adverse effects, including:
- Diarrhea
- Vomiting
- Abdominal pain
- Decrease in WBC
Dipyridamole
- Has two effects: anti-platelet and maximal effective dose of 50-320 mg (optimal dose = 80mg)
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Description
This quiz covers the mechanisms of action of anti-platelet drugs, including acetylsalicylic acid and P2Y12 antagonists.