Marie Garcia, age 67, reports that her chronic angina has been recurring even though she has been taking nitroglycerin sublingual tablets as prescribed. She tells the nurse that she used to store the tablets on a table by the window, and when she started to use a new batch of tablets, the problem subsided. What I would explain the ineffectiveness of the tablets?
Ms. Garcia developed unstable angina
Exposure to the elements (natural light) caused the drugs to lose their effectiveness
Ms. Garcia developed tolerance to the sublingual form of administration
Ms. Garcia did not follow the correct interval or duration of administration
The Correct Answer is B
Explanation:
A. There is no evidence in the scenario to suggest that Ms. Garcia developed unstable angina.
B. Exposure to light, particularly sunlight, can degrade nitroglycerin, reducing its effectiveness over time.
C. There is no indication that Ms. Garcia developed tolerance to sublingual nitroglycerin in this scenario.
D. Ms. Garcia's storage method for the nitroglycerin tablets, not the interval or duration of administration, likely affected their effectiveness.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. GABA (gamma-aminobutyric acid) is not typically targeted by antidepressants.
B. While some antidepressants may indirectly affect epinephrine and norepinephrine levels, the primary mechanism of action for most antidepressants is through increasing levels of serotonin and/or norepinephrine.
C. Antidepressants commonly work by increasing the levels of neurotransmitters such as norepinephrine and serotonin in the brain.
D. The reticular formation is not directly involved in the mechanism of action of antidepressants.
Correct Answer is B
Explanation
Explanation:
A. Beta blockers are used to manage blood pressure and heart rate but are a different class.
B. Isosorbide is a nitrate, which is used primarily to treat and prevent episodes of angina by relaxing and widening blood vessels.
C. Calcium channel blockers also manage blood pressure and chest pain but act through a different mechanism.
D. Glycoprotein IIb/IIIa receptor antagonists are used to prevent platelet aggregation and are typically used in acute coronary syndrome, not as a long-term treatment for angina.
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