a drug ending in the suffix tidine is considered a
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Nursing Elites

ATI RN

ATI Pharmacology Proctored

1. A drug ending in the suffix (tidine) is considered a ______.

Correct answer: D

Rationale: Drugs ending in -tidine are histamine (H2) receptor antagonists, which block the action of histamine at the H2 receptors, commonly used to reduce stomach acid production. Therefore, the correct answer is an 'H antagonist.' It is essential to be familiar with drug suffixes as they can provide clues to the drug's class and function.

2. A preschooler weighing 44 lb is to receive Amoxicillin 20 mg/kg/day PO divided equally every 12 hr. The available amoxicillin suspension is 250 mg/5 mL. How many mL should the nurse administer per dose?

Correct answer: A

Rationale: To calculate the dosage per administration: First, convert the weight to kg (44 lb / 2.2 lb/kg = 20 kg). Then, calculate the required dosage per dose: (20 mg/kg/day x 20 kg) / 2 (for every 12 hr dosing) = 200 mg per dose. To determine the mL per dose, divide the required dosage by the concentration of the amoxicillin suspension: (200 mg / 250 mg) x 5 mL = 4 mL per dose. Therefore, the correct answer is 4 mL. Choice B (5 mL) is incorrect because the correct calculation yields 4 mL. Choices C (6 mL) and D (3 mL) are also incorrect as they do not align with the accurate calculation based on the provided information.

3. A healthcare professional is about to administer Propranolol to a patient. The healthcare professional takes the patient's apical pulse and documents it as 58 bpm. How should the healthcare professional proceed?

Correct answer: D

Rationale: When a patient's apical pulse is 58 bpm, it is below the normal range. Propranolol is a beta-blocker that can further lower the heart rate. Therefore, it is crucial to withhold the medication and notify the healthcare provider to evaluate the patient's condition. Administering Propranolol in this situation can exacerbate bradycardia, leading to serious complications. Choosing to administer the medication as prescribed (Choice A) can put the patient at risk. Administering half of the normal dose (Choice B) without healthcare provider guidance is not appropriate in this case. Considering the extended-release form of the medication (Choice C) does not address the immediate concern of bradycardia and is not the best course of action.

4. A client with end-stage cancer receiving Morphine is prescribed Methylnaltrexone. The client's daughter asks why the provider prescribed Methylnaltrexone. Which of the following responses should the nurse make?

Correct answer: C

Rationale: The correct response is C: 'The medication will relieve your mother's constipation.' Methylnaltrexone is an opioid antagonist used to treat severe constipation unrelieved by laxatives in opioid-dependent clients. It works by blocking the mu opioid receptors in the GI tract, which helps alleviate constipation without affecting pain relief or causing withdrawal symptoms. Choices A, B, and D are incorrect. Methylnaltrexone's primary action is related to managing constipation rather than increasing respirations, preventing dependence on Morphine, or enhancing pain relief when used alongside Morphine.

5. A client with Diabetes is experiencing Nausea due to Gastroparesis. The healthcare provider should anticipate a prescription for which of the following medications?

Correct answer: B

Rationale: Metoclopramide, a dopamine antagonist, is indicated for treating nausea and increasing gastric motility. In the context of diabetic gastroparesis, it can alleviate bloating and nausea by enhancing gastric emptying. Lubiprostone (Choice A) is a chloride channel activator used for chronic idiopathic constipation and irritable bowel syndrome with constipation. Bisacodyl (Choice C) is a stimulant laxative primarily used for constipation. Loperamide (Choice D) is an anti-diarrheal agent and would not be appropriate for treating nausea and gastroparesis.

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