ATI RN
ATI Proctored Pharmacology Test
1. A healthcare professional in a provider's clinic is caring for a client who reports erectile dysfunction and requests a prescription for sildenafil. Which of the following medications currently prescribed for the client is a contraindication to taking sildenafil?
- A. Isosorbide
- B. Phenytoin
- C. Metronidazole
- D. Prednisone
Correct answer: A
Rationale: Sildenafil is contraindicated with nitrates like isosorbide due to the risk of severe hypotension. Isosorbide is a nitrate that can potentiate the hypotensive effects of sildenafil, leading to a dangerous drop in blood pressure. Therefore, it is essential to avoid concurrent use of isosorbide and sildenafil to prevent adverse effects. Phenytoin, metronidazole, and prednisone do not have significant interactions with sildenafil and are not contraindicated when used together.
2. A client with osteoporosis has a new prescription for alendronate. Which of the following instructions should the nurse provide?
- A. Take the medication with a meal.
- B. Remain upright for at least 30 minutes after taking the medication.
- C. Take the medication with a glass of juice.
- D. Take the medication with milk or food.
Correct answer: B
Rationale: The correct instruction for a client taking alendronate is to remain upright for at least 30 minutes after administration. This is essential to prevent esophageal irritation and ensure the medication reaches the stomach properly. Remaining upright reduces the risk of side effects such as esophagitis. Choices A, C, and D are incorrect as alendronate should not be taken with a meal, juice, milk, or food to optimize its absorption and effectiveness.
3. A client with chronic myeloid leukemia is receiving hydroxyurea. Which of the following findings should the nurse monitor?
- A. Hyperkalemia
- B. Hypertension
- C. Neutropenia
- D. Tinnitus
Correct answer: C
Rationale: The nurse should monitor the client for neutropenia when receiving hydroxyurea. Neutropenia is a common adverse effect caused by bone marrow suppression. It is essential to assess the client's white blood cell count regularly to detect neutropenia early and prevent complications such as infections.
4. A client is receiving heparin therapy. Which of the following laboratory values should the nurse monitor to evaluate the effectiveness of the therapy?
- A. PT
- B. aPTT
- C. INR
- D. Platelet count
Correct answer: B
Rationale: The corrected answer is B: aPTT. The activated partial thromboplastin time (aPTT) is the laboratory value used to monitor the effectiveness of heparin therapy. The aPTT should be maintained at 1.5 to 2 times the normal level to ensure therapeutic anticoagulation. Monitoring aPTT helps healthcare providers adjust heparin doses to achieve the desired anticoagulant effects and prevent complications such as bleeding or clotting. Choice A, PT (prothrombin time), is used to monitor warfarin therapy, not heparin. Choice C, INR (international normalized ratio), is also used to monitor warfarin therapy. Choice D, platelet count, is important for assessing the risk of bleeding, but it does not directly monitor the effectiveness of heparin therapy.
5. What is a severe adverse effect of iron supplementation?
- A. Seizures
- B. Dry mouth
- C. Edema
- D. Serotonin syndrome
Correct answer: A
Rationale: A severe adverse effect of iron supplementation is seizures. Iron toxicity can lead to symptoms such as abdominal pain, vomiting, bloody diarrhea, lethargy, and in severe cases, seizures. It is important for individuals taking iron supplements to follow recommended dosages to prevent adverse effects.
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