Pharmacology of Antithrombotic Drugs
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Questions and Answers

Which of the following is an example of a parenteral anticoagulant?

  • Enoxaparin (correct)
  • Warfarin
  • Clopidogrel
  • Alteplase

What is a known adverse effect of fibrinolytic drugs?

  • Nausea
  • Rash
  • Hemorrhage (correct)
  • Hypertension

Which of the following drugs is classified as an antiplatelet agent?

  • Dabigatran
  • Enoxaparin
  • Fondaparinux
  • Abciximab (correct)

What is the mechanism of action of vitamin K antagonists like warfarin?

<p>Inhibition of vitamin K epoxide reductase (C)</p> Signup and view all the answers

Which new oral anticoagulant is classified as a direct thrombin inhibitor?

<p>Dabigatran (D)</p> Signup and view all the answers

Which of the following foods is categorized under moderate interaction with anticoagulants?

<p>Cabbage (cooked) (D)</p> Signup and view all the answers

What is a possible side effect of high doses of aspirin?

<p>Hypoprothrombinemia (D)</p> Signup and view all the answers

Which drug is considered an alternative to heparin in case of heparin-induced thrombocytopenia (HIT)?

<p>Lepirudin (A)</p> Signup and view all the answers

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Flashcards

Antiplatelet Drugs

Drugs that prevent the formation of blood clots by interfering with platelet aggregation.

Anticoagulants

Drugs that prevent the formation of blood clots by inhibiting the coagulation cascade.

Fibrinolytic Drugs

Drugs that break down existing blood clots.

Bleeding

A common side effect of aspirin and other salicylates, which can range from mild nosebleeds to life-threatening hemorrhage.

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Heparin and Heparinoids

A class of anticoagulants that inhibit the formation of thrombin, a key enzyme in the coagulation cascade.

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Vitamin K Antagonists (VKA)

A class of anticoagulants that act by blocking vitamin K, a vital component in the coagulation process.

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New Oral Anticoagulants (NOACs)

A newer class of anticoagulants that act directly on specific clotting factors, offering advantages over traditional anticoagulants.

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Food-Drug Interactions

The interaction between food and drugs, particularly in relation to how food affects drug absorption and efficacy.

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Study Notes

Antiplatelet Drugs for Deep Vein Thrombosis

  • Antiplatelet drugs include aspirin, clopidogrel, cilostazol, abciximab, and dipyridamole.

Anticoagulants

  • Oral anticoagulants include warfarin and dicumarol.
  • Parenteral anticoagulants include heparin (natural), enoxaparin (fractionated heparin), and deltaparin.

Fibrinolytic Drugs

  • Fibrinolytic drugs, such as alteplase, urokinase, and streptokinase, are administered parenterally to dissolve clots.
  • Adverse effects include hemorrhage and hypersensitivity reactions.
  • Treatments for bleeding include aminocaproic acid or tranexamic acid, which inhibit fibrinolysis.

Aspirin Side Effects

  • Side effect of aspirin is bleeding, especially in the gastrointestinal tract. This is due to inhibition of prostaglandin synthesis.
  • High doses of aspirin and other salicylates directly affect hypoprothrombinemic activity and may increase the likelihood of bleeding.

Other Anticoagulants

  • Unfractionated heparin (UFH).
  • Low-molecular-weight heparin (LMWH) (enoxaparin, dalteparin).
  • Pentasaccharide-direct factor Xa inhibitor (fondaparinux).
  • Hirudin (alternatives to heparin in case of HIT: Lepirudin, Bivaluridin).
  • Heparinoids (danaparoid)
  • Oral Anticoagulants (vitamin K antagonists (VKA); Coumadin (warfarin)).

Other Drugs

  • Ticlopidine and clopidogrel: side effect is bleeding which may range in severity from mild nosebleeds to life-threatening hemorrhage
  • New Oral Anticoagulants (NOACs): dabigatran, rivaroxaban, apixaban, and edoxaban.

Drug Interactions with Food

  • Note that certain foods may have moderate interactions with certain drugs. These are noted in the provided document, but specific details are not included in these notes.

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Description

This quiz covers key concepts related to antiplatelet, anticoagulant, and fibrinolytic drugs used in the treatment of deep vein thrombosis. You will explore the mechanisms, side effects, and treatment protocols associated with these medications. Ideal for students studying pharmacology or healthcare professionals looking to refresh their knowledge.

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