ATI RN
Central Nervous System Stimulants and Related Drugs NCLEX Style Questions Questions
Question 1 of 5
Which drug most likely enhanced the action of vecuronium in the 66-year-old woman undergoing emergency surgery following a car accident?
Correct Answer: B
Rationale: Darifenacin, a muscarinic receptor antagonist used for urinary tract infections, may enhance the action of vecuronium by reducing the risk of cholinergic side effects, such as bradycardia or bronchoconstriction, associated with muscle relaxants. Gentamicin, Timolol, Latanoprost, and Lovastatin are unlikely to have a significant impact on the action of vecuronium in this context.
Question 2 of 5
In the treatment of congenital adrenal hyperplasia in which there is excess production of cortisol precursor, the purpose of administration of synthetic glucocorticoid is:
Correct Answer: D
Rationale: In CAH (choice D), synthetic glucocorticoids suppress ACTH, reducing adrenal precursor excess (e.g., 17-hydroxyprogesterone). Aldosterone (choice A), renal (choice B), and immune (choice C) effects aren't primary goals. ACTH suppression corrects the defect.
Question 3 of 5
Which of the following opioids would be contraindicated in this patient?
Correct Answer: A
Rationale: In a patient with acute myocardial infarction, morphine would be contraindicated due to its potential to cause hypotension and respiratory depression, which can exacerbate the patient's condition.
Question 4 of 5
Instead of depressing, morphine stimulates
Correct Answer: B
Rationale: Morphine stimulates the Edinger-Westphal nucleus, causing pupillary constriction (miosis).
Question 5 of 5
A 73-year-old man presents to his primary care physician complaining of a weak stream and nocturia four times at night. He is very sensitive to the medication side effects and is reluctant to take medications for this reason. Physical examination reveals a mildly enlarged prostate. Treatment of this condition may involve the use of which of the following agents to minimize side effects?
Correct Answer: D
Rationale: Tamsulosin is an α1-adrenergic receptor antagonist that is selective for the prostate and bladder neck, minimizing systemic side effects like hypotension.