NCLEX-RN Pharmacology Practice
Questions: 20 Gastrointestinal System
Medication Safety MCQs with Detailed
Rationales |
ATI & NGN Style
Question 1
Clinical Scenario
A 45-year-old client is prescribed omeprazole 20 mg daily for
gastroesophageal reflux disease (GERD). The nurse is providing
discharge teaching regarding this medication.
Question Stem
Which statement by the client indicates an understanding of the
teaching?
A. "I should take this medication on an empty stomach at bedtime."
B. "I will crush the capsule and mix it with applesauce if I have
trouble swallowing."
C. "I should take this medication 30 to 60 minutes before my first
meal of the day."
,D. "I can stop taking this medication as soon as my heartburn
symptoms resolve."
Correct Answer
Correct Answer: C. "I should take this medication 30 to 60 minutes
before my first meal of the day."
Detailed Rationale
Omeprazole, a proton pump inhibitor (PPI), is most effective when
taken 30 to 60 minutes before the first meal of the day. This specific
timing allows the medication to reach peak blood levels precisely
when the gastric proton pumps are most active, which occurs
during meal stimulation. Option A is incorrect because PPIs are best
taken before a meal, not at bedtime on an empty stomach, which
reduces their acid-suppressing efficacy. Option B is incorrect
because omeprazole delayed-release capsules are enteric-coated
to protect the active drug from degradation by stomach acid;
crushing or chewing them destroys this protective coating and
significantly reduces therapeutic efficacy. Option D is incorrect
because PPIs should not be stopped abruptly without healthcare
provider guidance, as sudden discontinuation can cause rebound
acid hypersecretion, worsening the client's symptoms. Long-term
management often requires a gradual, supervised taper to safely
discontinue the medication. Therefore, educating the client on
proper timing and administration is a critical nursing responsibility
to ensure optimal therapeutic outcomes.
Learning Objective
• Identify the optimal timing for proton pump inhibitor
administration.
,• Recognize the importance of not crushing enteric-coated
medications.
• Educate patients on the risks of abrupt discontinuation of acid-
suppressing therapy.
Medication Safety Focus
Medication administration
Question 2
Clinical Scenario
A 60-year-old client is admitted with acute gastroenteritis and is
prescribed loperamide 4 mg initially, followed by 2 mg after each
unformed stool.
Question Stem
Which adverse effect of loperamide should the nurse instruct the
client to report to the healthcare provider?
A. Mild drowsiness
B. Abdominal distension and absence of bowel sounds
C. Dry mouth
D. Temporary change in stool color
Correct Answer
Correct Answer: B. Abdominal distension and absence of bowel
sounds
Detailed Rationale
Loperamide is an antidiarrheal medication that works by slowing
intestinal motility and prolonging the transit time of intestinal
, contents. A serious, potentially life-threatening adverse effect is the
development of toxic megacolon or paralytic ileus, particularly in
clients with severe diarrhea, underlying inflammatory bowel
disease, or those taking high doses. Abdominal distension and
absent bowel sounds are hallmark clinical signs of ileus and require
immediate medical intervention and discontinuation of the drug.
Mild drowsiness and dry mouth (Options A and C) are common,
benign anticholinergic-like side effects that do not typically require
provider notification unless they become severe or debilitating.
Temporary changes in stool color (Option D) are not a recognized
adverse effect of loperamide; this finding is more commonly
associated with medications like bismuth subsalicylate, which can
turn stool black. Nurses must thoroughly assess bowel sounds and
abdominal girth before administering antidiarrheals to prevent
exacerbating an underlying obstruction.
Learning Objective
• Recognize serious adverse effects of antidiarrheal medications.
• Differentiate between benign side effects and complications
requiring immediate intervention.
• Prioritize assessment findings indicative of paralytic ileus.
Medication Safety Focus
Adverse effect
Question 3
Clinical Scenario
A nursing student is reviewing the pharmacology of gastrointestinal
medications with the clinical instructor.
Questions: 20 Gastrointestinal System
Medication Safety MCQs with Detailed
Rationales |
ATI & NGN Style
Question 1
Clinical Scenario
A 45-year-old client is prescribed omeprazole 20 mg daily for
gastroesophageal reflux disease (GERD). The nurse is providing
discharge teaching regarding this medication.
Question Stem
Which statement by the client indicates an understanding of the
teaching?
A. "I should take this medication on an empty stomach at bedtime."
B. "I will crush the capsule and mix it with applesauce if I have
trouble swallowing."
C. "I should take this medication 30 to 60 minutes before my first
meal of the day."
,D. "I can stop taking this medication as soon as my heartburn
symptoms resolve."
Correct Answer
Correct Answer: C. "I should take this medication 30 to 60 minutes
before my first meal of the day."
Detailed Rationale
Omeprazole, a proton pump inhibitor (PPI), is most effective when
taken 30 to 60 minutes before the first meal of the day. This specific
timing allows the medication to reach peak blood levels precisely
when the gastric proton pumps are most active, which occurs
during meal stimulation. Option A is incorrect because PPIs are best
taken before a meal, not at bedtime on an empty stomach, which
reduces their acid-suppressing efficacy. Option B is incorrect
because omeprazole delayed-release capsules are enteric-coated
to protect the active drug from degradation by stomach acid;
crushing or chewing them destroys this protective coating and
significantly reduces therapeutic efficacy. Option D is incorrect
because PPIs should not be stopped abruptly without healthcare
provider guidance, as sudden discontinuation can cause rebound
acid hypersecretion, worsening the client's symptoms. Long-term
management often requires a gradual, supervised taper to safely
discontinue the medication. Therefore, educating the client on
proper timing and administration is a critical nursing responsibility
to ensure optimal therapeutic outcomes.
Learning Objective
• Identify the optimal timing for proton pump inhibitor
administration.
,• Recognize the importance of not crushing enteric-coated
medications.
• Educate patients on the risks of abrupt discontinuation of acid-
suppressing therapy.
Medication Safety Focus
Medication administration
Question 2
Clinical Scenario
A 60-year-old client is admitted with acute gastroenteritis and is
prescribed loperamide 4 mg initially, followed by 2 mg after each
unformed stool.
Question Stem
Which adverse effect of loperamide should the nurse instruct the
client to report to the healthcare provider?
A. Mild drowsiness
B. Abdominal distension and absence of bowel sounds
C. Dry mouth
D. Temporary change in stool color
Correct Answer
Correct Answer: B. Abdominal distension and absence of bowel
sounds
Detailed Rationale
Loperamide is an antidiarrheal medication that works by slowing
intestinal motility and prolonging the transit time of intestinal
, contents. A serious, potentially life-threatening adverse effect is the
development of toxic megacolon or paralytic ileus, particularly in
clients with severe diarrhea, underlying inflammatory bowel
disease, or those taking high doses. Abdominal distension and
absent bowel sounds are hallmark clinical signs of ileus and require
immediate medical intervention and discontinuation of the drug.
Mild drowsiness and dry mouth (Options A and C) are common,
benign anticholinergic-like side effects that do not typically require
provider notification unless they become severe or debilitating.
Temporary changes in stool color (Option D) are not a recognized
adverse effect of loperamide; this finding is more commonly
associated with medications like bismuth subsalicylate, which can
turn stool black. Nurses must thoroughly assess bowel sounds and
abdominal girth before administering antidiarrheals to prevent
exacerbating an underlying obstruction.
Learning Objective
• Recognize serious adverse effects of antidiarrheal medications.
• Differentiate between benign side effects and complications
requiring immediate intervention.
• Prioritize assessment findings indicative of paralytic ileus.
Medication Safety Focus
Adverse effect
Question 3
Clinical Scenario
A nursing student is reviewing the pharmacology of gastrointestinal
medications with the clinical instructor.
