ATI RN
Pharmacology ATI Test Bank Questions
Question 1 of 5
Drugs that acts simultaneously on a mixed group of receptors with an agonist action on one set and with an antagonist action on the other.
Correct Answer: B
Rationale: Drugs that act simultaneously on a mixed group of receptors with an agonist action on one set and with an antagonist action on the other are termed as mixed agonist-antagonists. These drugs can have a dual effect on different types of receptors within the same system. They can elicit both agonist-like responses at one receptor and antagonist-like responses at another receptor, leading to a mixed overall effect on the system. This unique property makes them different from pure agonists, pure antagonists, or partial agonists which typically have a unidirectional effect on receptors.
Question 2 of 5
Amoxicillin is prescribed for a patient who has a respiratory infection. The nurse is teaching the patient about this medication and realizes that more teaching is needed when the patient makes which statement?
Correct Answer: A
Rationale: Amoxicillin is an antibiotic that is generally well-absorbed with or without food, but taking it with food can help reduce gastrointestinal side effects such as nausea. The statement 'This medication should not be taken with food' indicates a misunderstanding, as food does not significantly impair its absorption. The other statements are correct: completing the prescription prevents antibiotic resistance, reporting genital itching is important for identifying potential yeast infections, and excess bleeding could indicate a rare but serious side effect like thrombocytopenia.
Question 3 of 5
A patient with a history of malaria who is being treated with chloroquine is in the clinic for a follow-up visit. What should the nurse advise the patient to do?
Correct Answer: A
Rationale: Chloroquine can cause retinopathy, so patients should be advised to report any visual changes promptly. Taking the medication with milk is not necessary. Sunlight avoidance is not specifically required for chloroquine, though it may cause photosensitivity in some patients. Increasing fluid intake is not a specific recommendation for chloroquine use.
Question 4 of 5
A 75-year-old male patient was admitted to the unit with angina. He was started on nadolol (Corgard). The patient asks why he is taking this medication because he does not have high blood pressure. What is the nurse’s best response?
Correct Answer: A
Rationale: Decreased heart rate, contractility, and excitability, as well as a membrane-stabilizing effect, lead to a decrease in arrhythmias, a decreased cardiac workload, and decreased oxygen consumption. The juxtaglomerular cells are not stimulated to release renin, which further decreases the blood pressure. These effects are useful in treating hypertension and chronic angina and can help to prevent reinfarction after a myocardial infarction by decreasing cardiac workload and oxygen consumption. Corgard will not prevent blood pressure problems, arrhythmias, or glaucoma in the future. Corgard is not used to treat BPH.
Question 5 of 5
The nurse noted a patient's heart rate decreasing from 45 to 38 while administering atropine 0.3 mg IV. What is the most likely explanation?
Correct Answer: D
Rationale: Atropine is a parasympatholytic drug that blocks the action of the vagus nerve on the heart, typically increasing heart rate. However, in rare cases, atropine can cause an initial paradoxical slowing of the heart rate before the expected increase. This occurs because atropine may initially stimulate the vagus nerve at low doses before blocking its effects. The dose of 0.3 mg IV is relatively low, which could explain this phenomenon. The other options are incorrect because atropine does not stimulate the vagus nerve (A), the dose is not necessarily too low (B), and adenosine is not indicated for bradycardia (C).