ATI RN
Central Nervous System Stimulants and Related Drugs NCLEX Style Questions Questions
Question 1 of 5
Which of the following best describes the MAC of an inhalational anesthetic?
Correct Answer: A
Rationale: The MAC (minimum alveolar concentration) of an inhalational anesthetic is defined as the alveolar concentration at which 50% of patients do not move in response to a surgical stimulus. It is related to the blood/gas partition coefficient of the anesthetic, which determines the rate at which the anesthetic enters and leaves the bloodstream, influencing its potency.
Question 2 of 5
Which of the following is useful in treatment of trigeminal neuralgia:
Correct Answer: D
Rationale: Carbamazepine (choice D), an anticonvulsant, treats trigeminal neuralgia by stabilizing sodium channels, reducing nerve firing. Phenylbutazone (choice A), an NSAID, and Morphine (choice B), an opioid, aren't first-line. Atropine (choice C), an anticholinergic, is irrelevant. Carbamazepine is the standard therapy.
Question 3 of 5
A newborn with transposition of great arteries needed to keep the ductus arteriosus open. The drug used was
Correct Answer: D
Rationale: Misoprostol, a prostaglandin E1 analog, helps maintain ductus arteriosus patency.
Question 4 of 5
A H1 receptor antagonist has limited beneficial effect in
Correct Answer: D
Rationale: H1 receptor antagonists have minimal impact in reversing extrapyramidal symptoms, which are best addressed by anticholinergics.
Question 5 of 5
Instead of depressing, morphine stimulates
Correct Answer: B
Rationale: Morphine stimulates the Edinger-Westphal nucleus, causing pupillary constriction (miosis).