ATI RN
ATI Pharmacology Proctored Exam 2024 Questions
Question 1 of 5
A patient has been ordered the powdered form of the bile acid sequestrant colestipol. Which of the following does the nurse identify as true?
Correct Answer: D
Rationale: The nurse should identify that colestipol should be administered 1 hour before or 4 to 6 hours after any other oral medication. This is because colestipol can interfere with the absorption of other medications due to its binding properties in the gut. Administering it separately from other medications helps to avoid any potential interaction and ensures the effectiveness of both the colestipol and other medications. Additionally, colestipol is typically taken with meals to enhance its tolerability and effectiveness in lowering cholesterol levels.
Question 2 of 5
When converting from IV heparin to oral warfarin (Coumadin) therapy, the prescriber monitors which of the following to determine the next appropriate dose of warfarin?
Correct Answer: D
Rationale: When converting from IV heparin to oral warfarin therapy, the prescriber monitors the Prothrombin Time (PT) and International Normalized Ratio (INR) to determine the next appropriate dose of warfarin. PT measures the time it takes for blood to clot and INR helps standardize PT results. These tests are crucial in evaluating and adjusting the dosage of warfarin to achieve the desired anticoagulant effect while minimizing the risk of bleeding. Monitoring PT/INR levels regularly is essential to ensure that the patient receives the correct dose of warfarin for their specific condition and to prevent complications. Platelet levels, aPTT, and red blood cell count are not typically used to monitor warfarin therapy.
Question 3 of 5
A patient has been prescribed warfarin (Coumadin) in addition to a heparin infusion. The patient asks the nurse why he has to be on two medications. The nurse™s response is based on which rationale?
Correct Answer: D
Rationale: Heparin is a fast-acting, short-term anticoagulant that is often used to rapidly initiate anticoagulation in situations where immediate blood thinning is necessary, such as in patients with certain medical conditions or undergoing procedures. On the other hand, warfarin (Coumadin) is a slower-acting, longer-term anticoagulant that takes time to reach therapeutic levels in the bloodstream. By using heparin to start anticoagulation, the patient is protected against clot formation while waiting for the warfarin to reach adequate levels to provide ongoing anticoagulation therapy. This approach minimizes the risk of clot formation during the transition period between medications.
Question 4 of 5
What is the antidote for Warfarin?
Correct Answer: C
Rationale: The antidote for Warfarin, a common blood thinner medication, is Vitamin K. Warfarin works by inhibiting Vitamin K-dependent coagulation factors, which prevents blood clotting. In case of an overdose or excessive bleeding while taking Warfarin, administering Vitamin K can help counteract the effects of the medication and promote blood clotting.
Question 5 of 5
Which of the following describes the action of an agonist on a receptor.
Correct Answer: C
Rationale: An agonist is a substance that binds to a receptor and activates it, leading to a biological response. Agonists mimic the action of endogenous ligands that normally bind to the receptor, resulting in activation of downstream signaling pathways. This activation can lead to various physiological effects depending on the specific receptor and pathway involved. In contrast, antagonists block or inhibit the actions of agonists by binding to the receptor without activating it, therefore not producing a response. Therefore, the correct answer is that an agonist activates a receptor.