ATI RN
Central Nervous System Stimulants and Related Drugs NCLEX Style Questions Questions
Question 1 of 5
EDTA is useful in poisoning due to all except
Correct Answer: B
Rationale: EDTA is effective for chelation therapy in lead and zinc poisoning but it is not used for iron poisoning as iron chelation requires a different agent like deferoxamine.
Question 2 of 5
A 7-year-old boy is brought to the emergency department by his parents after being stung by a bee. The parents say that he is allergic to bee stings, and the patient is having great difficulty breathing. Epinephrine is administered immediately. His symptoms improve as molecules of epinephrine bind to β\(_2\)-receptors in bronchial smooth muscle. Which of the following describes a feature of β\(_2\)-receptors?
Correct Answer: A
Rationale: β\(_2\)-adrenergic receptors are G-protein-coupled receptors that have seven transmembrane domains, which is a characteristic feature of this receptor family.
Question 3 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 4 of 5
Following is an amide-linked local anesthetic
Correct Answer: A
Rationale: Bupivacaine is an amide local anesthetic; procaine and tetracaine are esters.
Question 5 of 5
Corticosteroids are used in treatment of the following conditions EXCEPT:
Correct Answer: A
Rationale: Corticosteroids treat anaphylaxis (choice A), transplantation (choice B), and osteoarthritis (choice C) via anti-inflammatory effects. Hypertension (choice D) is a side effect, not an indication, making it the exception. This clarifies therapeutic scope.