ATI RN
Central Nervous System Stimulants and Related Drugs NCLEX Style Questions Questions
Question 1 of 5
Choose the correct statement from the following
Correct Answer: C
Rationale: Picrotoxin is a GABA-A receptor antagonist that blocks chloride channels, leading to convulsant effects.
Question 2 of 5
Which of the following antipsychotics (in excess dose) is responsible for cardiac arrhythmias?
Correct Answer: C
Rationale: Thioridazine has been associated with QT prolongation and a higher risk of cardiac arrhythmias.
Question 3 of 5
The segmental level of spinal anesthesia depends on
Correct Answer: D
Rationale: Spinal anesthesia level is influenced by multiple factors including drug volume gravity and patient posture.
Question 4 of 5
Peak serum level of orally administered lithium is usually achieved in
Correct Answer: C
Rationale: Lithium reaches its peak serum levels typically within 2 to 4 hours after oral administration.
Question 5 of 5
Diethylstilbestrol (DES) should never be used in pregnant women because it is associated with all of the following EXCEPT:
Correct Answer: A
Rationale: DES, a synthetic estrogen, causes deep vein thrombosis (choice A), feminization of male offspring (choice B), and miscarriages (choice C) in pregnancy, linked to historical congenital anomalies (e.g., vaginal adenocarcinoma). Virilization of female offspring (choice D) isn't reported; DES mimics estrogen, not androgens. This exception highlights its teratogenic risks, banning its use in pregnancy.