PharmacologyLesson 1 of 3 in the course Anticoagulant, Antiplatelet, and Thrombolytic Drugs

Anticoagulants: Drug Actions, Monitoring, Safety, and Reversal

5 flashcards · 5 quiz questions · 5 match pairs · 4 fill-in sentences · English

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Summary

Anticoagulants reduce the blood’s tendency to form new clots. This lesson introduces their purpose, routes, safety considerations, and the tests used to monitor their effects.

Anticoagulants, often called blood thinners, act at different points in the coagulation cascade to reduce clot formation. They do not dissolve existing clots. Instead, they help prevent a clot from growing or new clots from forming while the body gradually breaks down existing clots. Thrombolytics are the drugs that actively dissolve clots.

All flashcards

How is PTT/aPTT used in anticoagulant therapy?
It is commonly used to monitor heparin infusions; a typical baseline PTT is about 25–35 seconds.
When is activated clotting time (ACT) useful?
It provides rapid clotting-time results during procedures such as cardiac catheterization or cardiopulmonary bypass.
What is a common therapeutic INR goal for warfarin?
A common goal is 2–3, although some clients with mechanical heart valves have a goal of 2.5–3.5.
What injection technique is recommended for enoxaparin?
Inject it subcutaneously into the abdomen while holding a skin fold; do not rub the site afterward.
Why should a DOAC not be stopped prematurely without medical guidance?
Premature discontinuation can increase thrombotic risk.

Quiz questions

  1. How does heparin reduce clot formation?Answer: It enhances antithrombin-mediated inactivation of several clotting factors.
  2. What is characteristic of heparin-induced thrombocytopenia (HIT)?Answer: An immune reaction lowers platelet counts while increasing the risk of thrombosis.
  3. How long may it take for warfarin to produce its full anticoagulant effect?Answer: About 5–7 days
  4. How should dabigatran capsules be taken?Answer: Swallow them whole without opening, crushing, or chewing them.
  5. Which medication reverses dabigatran in life-threatening or uncontrolled bleeding?Answer: Idarucizumab

Based on Pharmacology for Nurses by Tina Barbour-Taylor, Leah Mueller (Sabato), Donna Paris, Dorie Weaver (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

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