NCLEX-RN Pharmacology Practice
Questions |
Gastrointestinal System |
20 NGN-Style MCQs with Detailed
Rationales |
ATI Pharmacology Made Easy Nursing
Exam Prep
Question 1
[Difficulty: Easy]
Clinical Scenario
A 45-year-old male diagnosed with gastroesophageal reflux disease
(GERD) is prescribed omeprazole 20 mg orally daily.
Question Stem
Which statement by the client indicates an understanding of the
patient teaching regarding this medication?
Options
A. "I will crush the capsule and mix it with applesauce if I have
trouble swallowing."
,B. "I can stop taking this medication as soon as my heartburn
symptoms resolve."
C. "I should take this medication 30 to 60 minutes before my first
meal of the day."
D. "I will take this medication at bedtime with a full glass of milk."
Correct Answer
Correct Answer: C. "I should take this medication 30 to 60 minutes
before my first meal of the day."
Detailed Rationale
Omeprazole is a proton pump inhibitor (PPI) that is most effective
when taken 30 to 60 minutes before the first meal of the day. Food
stimulates the proton pumps, allowing the medication to bind and
inhibit them effectively for maximal acid suppression. Option A is
incorrect because delayed-release capsules should not be crushed
or chewed, as this destroys the enteric coating and leads to
premature degradation of the drug in the acidic stomach
environment. Option B is incorrect because PPI therapy for GERD
typically requires a full course (e.g., 4 to 8 weeks) to allow
esophageal healing, and abrupt cessation can cause rebound acid
hypersecretion. Option D is incorrect because taking it at bedtime
with milk is less effective than morning pre-meal administration,
and milk does not enhance PPI efficacy.
Learning Objective
• Identify the optimal timing for proton pump inhibitor
administration.
• Recognize the importance of completing the prescribed course
of GERD therapy.
, • Educate patients on the proper handling of delayed-release
medications.
Medication Safety Focus
Medication administration
Question 2
[Difficulty: Moderate]
Clinical Scenario
A 68-year-old female is in the post-anesthesia care unit (PACU)
following abdominal surgery. She reports severe nausea. The
provider prescribes ondansetron 4 mg IV push. The patient's recent
ECG shows a QT interval of 480 milliseconds.
Question Stem
Which action should the nurse take first?
Options
A. Administer the ondansetron as prescribed to relieve the patient's
nausea.
B. Check the patient's blood pressure and heart rate before
proceeding.
C. Withhold the medication and notify the healthcare provider
immediately.
D. Request a prescription for promethazine instead to avoid
gastrointestinal side effects.
, Correct Answer
Correct Answer: C. Withhold the medication and notify the
healthcare provider immediately.
Detailed Rationale
Ondansetron, a serotonin (5-HT3) receptor antagonist, carries a risk
of dose-dependent QT interval prolongation, which can lead to life-
threatening arrhythmias such as Torsades de Pointes. A QT interval
of 480 milliseconds is prolonged (normal is typically <450 ms in men
and <460 ms in women). The nurse's priority action is to withhold
the medication and notify the healthcare provider to discuss
alternative antiemetics or obtain a repeat ECG. Administering the
medication (Option A) is unsafe and could precipitate a fatal
arrhythmia. While checking vital signs (Option B) is important, it
does not address the specific, identified ECG contraindication.
Requesting promethazine (Option D) is premature; the nurse must
first notify the provider to address the immediate safety concern
rather than independently altering the plan of care.
Learning Objective
• Recognize the cardiovascular risks associated with
ondansetron administration.
• Prioritize nursing interventions when a medication
contraindication is identified.
• Interpret basic ECG findings relevant to medication safety.
Medication Safety Focus
Contraindication
Questions |
Gastrointestinal System |
20 NGN-Style MCQs with Detailed
Rationales |
ATI Pharmacology Made Easy Nursing
Exam Prep
Question 1
[Difficulty: Easy]
Clinical Scenario
A 45-year-old male diagnosed with gastroesophageal reflux disease
(GERD) is prescribed omeprazole 20 mg orally daily.
Question Stem
Which statement by the client indicates an understanding of the
patient teaching regarding this medication?
Options
A. "I will crush the capsule and mix it with applesauce if I have
trouble swallowing."
,B. "I can stop taking this medication as soon as my heartburn
symptoms resolve."
C. "I should take this medication 30 to 60 minutes before my first
meal of the day."
D. "I will take this medication at bedtime with a full glass of milk."
Correct Answer
Correct Answer: C. "I should take this medication 30 to 60 minutes
before my first meal of the day."
Detailed Rationale
Omeprazole is a proton pump inhibitor (PPI) that is most effective
when taken 30 to 60 minutes before the first meal of the day. Food
stimulates the proton pumps, allowing the medication to bind and
inhibit them effectively for maximal acid suppression. Option A is
incorrect because delayed-release capsules should not be crushed
or chewed, as this destroys the enteric coating and leads to
premature degradation of the drug in the acidic stomach
environment. Option B is incorrect because PPI therapy for GERD
typically requires a full course (e.g., 4 to 8 weeks) to allow
esophageal healing, and abrupt cessation can cause rebound acid
hypersecretion. Option D is incorrect because taking it at bedtime
with milk is less effective than morning pre-meal administration,
and milk does not enhance PPI efficacy.
Learning Objective
• Identify the optimal timing for proton pump inhibitor
administration.
• Recognize the importance of completing the prescribed course
of GERD therapy.
, • Educate patients on the proper handling of delayed-release
medications.
Medication Safety Focus
Medication administration
Question 2
[Difficulty: Moderate]
Clinical Scenario
A 68-year-old female is in the post-anesthesia care unit (PACU)
following abdominal surgery. She reports severe nausea. The
provider prescribes ondansetron 4 mg IV push. The patient's recent
ECG shows a QT interval of 480 milliseconds.
Question Stem
Which action should the nurse take first?
Options
A. Administer the ondansetron as prescribed to relieve the patient's
nausea.
B. Check the patient's blood pressure and heart rate before
proceeding.
C. Withhold the medication and notify the healthcare provider
immediately.
D. Request a prescription for promethazine instead to avoid
gastrointestinal side effects.
, Correct Answer
Correct Answer: C. Withhold the medication and notify the
healthcare provider immediately.
Detailed Rationale
Ondansetron, a serotonin (5-HT3) receptor antagonist, carries a risk
of dose-dependent QT interval prolongation, which can lead to life-
threatening arrhythmias such as Torsades de Pointes. A QT interval
of 480 milliseconds is prolonged (normal is typically <450 ms in men
and <460 ms in women). The nurse's priority action is to withhold
the medication and notify the healthcare provider to discuss
alternative antiemetics or obtain a repeat ECG. Administering the
medication (Option A) is unsafe and could precipitate a fatal
arrhythmia. While checking vital signs (Option B) is important, it
does not address the specific, identified ECG contraindication.
Requesting promethazine (Option D) is premature; the nurse must
first notify the provider to address the immediate safety concern
rather than independently altering the plan of care.
Learning Objective
• Recognize the cardiovascular risks associated with
ondansetron administration.
• Prioritize nursing interventions when a medication
contraindication is identified.
• Interpret basic ECG findings relevant to medication safety.
Medication Safety Focus
Contraindication
