ATI RN
ATI Pharmacology Proctored Exam 2023
1. A healthcare professional is preparing to administer heparin 15,000 units subcutaneously every 12 hours. The available heparin injection is 20,000 units/mL. How many milliliters should the healthcare professional administer per dose?
- A. 0.8 mL
- B. 0.75 mL
- C. 0.5 mL
- D. 1 mL
Correct answer: A
Rationale: To calculate the volume to administer, use the formula: Desired dose / Concentration = Volume to administer. In this case, (15,000 units / 20,000 units/mL) = 0.75 mL. Since the volume needs to be rounded up to the nearest tenth, the correct answer is 0.8 mL. Choice B (0.75 mL) is incorrect because it does not account for rounding up the volume. Choices C (0.5 mL) and D (1 mL) are incorrect as they do not reflect the precise calculation based on the given concentration and desired dose.
2. A healthcare provider is providing discharge instructions to a client who has a new prescription for Warfarin. Which of the following over-the-counter medications should the provider instruct the client to avoid?
- A. Acetaminophen
- B. Ibuprofen
- C. Diphenhydramine
- D. Loratadine
Correct answer: B
Rationale: Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that can increase the risk of bleeding when taken with Warfarin due to its antiplatelet effects. The combination of Warfarin, an anticoagulant, and NSAIDs can potentiate the risk of bleeding complications. Clients on Warfarin should avoid NSAIDs like ibuprofen and opt for alternative pain relief options such as acetaminophen. Diphenhydramine and loratadine are antihistamines and are generally safe to use with Warfarin as they do not significantly increase the risk of bleeding when compared to NSAIDs like ibuprofen.
3. A client has a new prescription for Prednisone and is receiving discharge instructions. Which of the following dietary instructions should the nurse include?
- A. Increase your intake of potassium-rich foods.
- B. Increase your intake of dairy products.
- C. Avoid foods high in vitamin K.
- D. Decrease your intake of protein.
Correct answer: A
Rationale: The correct answer is to increase the intake of potassium-rich foods. Prednisone can lead to potassium depletion; therefore, it is essential for clients to consume foods high in potassium such as bananas, oranges, and spinach to counteract this effect and maintain electrolyte balance. Choice B is incorrect because increasing dairy products is not directly related to the side effects of Prednisone. Choice C is incorrect because avoiding foods high in vitamin K is more relevant for clients on anticoagulants. Choice D is incorrect because decreasing protein intake is not a typical dietary instruction for clients prescribed Prednisone.
4. A healthcare professional is preparing to administer Haloperidol 2 mg PO every 12 hr. The available dosage is haloperidol 1 mg/tablet. How many tablets should the healthcare professional administer?
- A. 1 tablet
- B. 2 tablets
- C. 3 tablets
- D. 4 tablets
Correct answer: B
Rationale: To determine the number of tablets needed, divide the desired dose by the dose per tablet. In this case, (2 mg / 1 mg/tablet) = 2 tablets required to administer the prescribed dose of Haloperidol.
5. A client who has been taking prednisone to treat asthma is advised to discontinue the medication. The client should be instructed to reduce the dose gradually to prevent which of the following adverse effects?
- A. Hyperglycemia
- B. Adrenocortical insufficiency
- C. Severe dehydration
- D. Rebound pulmonary congestion
Correct answer: B
Rationale: Abruptly stopping prednisone can result in adrenocortical insufficiency due to suppression of the adrenal glands. Gradually tapering the dose helps the body adjust and resume its natural cortisol production, preventing adrenal insufficiency. Choice A, hyperglycemia, is a possible adverse effect of prednisone, but it is not the primary reason for gradual tapering. Severe dehydration (Choice C) and rebound pulmonary congestion (Choice D) are not typically associated with discontinuing prednisone.
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