ATI RN PHARMACOLOGY PROCTORED
MIDTERM EXAM V2
70 Questions & Answers with Dosage Calculations | NGN Clinical Judgment Integrated
2026/2027 Updated | Pass Guaranteed - A+ Graded
, SECTION 1: PHARMACOLOGICAL FOUNDATIONS AND MEDICATION SAFETY
(Q1-Q10)
Q1: A client asks the nurse why a medication must be taken on an empty stomach. Which response is
best?
A. Taking it on an empty stomach improves distribution.
B. Food can delay or reduce the absorption of this medication. **[CORRECT]**
C. An empty stomach speeds up metabolism of the drug.
D. Food increases the excretion of this medication.
Correct Answer: B
Rationale:
Absorption is the process by which a drug moves from the site of administration into the bloodstream. Certain
medications have significantly reduced or delayed absorption when taken with food due to interactions with gastric pH,
chelation with dietary cations (e.g., fluoroquinolones with calcium), or delayed gastric emptying. Distribution refers to the
movement of drugs from the blood to tissues and is not directly affected by food intake. Metabolism occurs primarily in
the liver and is not directly affected by the presence or absence of food in the stomach. Excretion is the elimination of
drugs from the body, primarily through the kidneys, and is not affected by taking medications on an empty stomach.
Q2: A nurse is administering a beta-2 agonist bronchodilator. The nurse understands this medication has
which type of action at the receptor?
A. Partial agonist
B. Agonist **[CORRECT]**
C. Antagonist
D. Inverse agonist
Correct Answer: B
Rationale:
A beta-2 agonist binds to beta-2 adrenergic receptors and activates them, producing a physiological response
(bronchodilation). An agonist is a drug that binds to a receptor and produces the same type of response as the
endogenous substance. A partial agonist produces a submaximal response even when all receptors are occupied. An
antagonist binds to a receptor but does not produce a response and blocks the action of the agonist. An inverse agonist
binds to the same receptor as an agonist but produces the opposite effect. Understanding receptor pharmacology is
essential for predicting drug effects and adverse reactions.
Q3: Which of the following is one of the Six Rights of medication administration?
A. Right documentation **[CORRECT]**
B. Right room
C. Right family
D. Right diet
Correct Answer: A
Rationale:
The Six Rights of medication administration are: right client, right medication, right dose, right route, right time, and right
documentation. Right documentation is the sixth right and ensures that the medication administration is recorded in the
client's medical record, providing a legal record and promoting continuity of care. Right room, right family, and right diet
are not among the Six Rights, although other rights have been proposed in expanded versions. The nurse must verify
all Six Rights before, during, and after administering any medication to ensure client safety and prevent medication
errors.
Q4: Which medication is classified as a high-alert medication by the Institute for Safe Medication Practices
(ISMP)?
A. Acetaminophen (Tylenol)
, B. Warfarin (Coumadin) **[CORRECT]**
C. Diphenhydramine (Benadryl)
D. Omeprazole (Prilosec)
Correct Answer: B
Rationale:
High-alert medications are drugs that bear a heightened risk of causing significant patient harm when used in error. The
ISMP classifies anticoagulants (including warfarin, heparin, and direct oral anticoagulants) as high-alert medications
due to the serious bleeding risk associated with dosing errors. Acetaminophen, diphenhydramine, and omeprazole are
not classified as high-alert medications. While they can cause adverse effects, the consequences of errors are generally
less severe. Nurses must exercise additional safety precautions when administering high-alert medications, including
independent double-checks of doses and careful patient monitoring.
Q5: A client taking warfarin (Coumadin) is prescribed phenytoin (Dilantin). The nurse should monitor for
which effect?
A. Increased bleeding risk **[CORRECT]**
B. Decreased INR
C. Reduced seizure activity
D. Increased therapeutic effect of warfarin
Correct Answer: A
Rationale:
Phenytoin is a hepatic enzyme inducer (CYP450 inducer) that can increase the metabolism of warfarin, but it also
displaces warfarin from protein-binding sites, leading to a transient increase in free (active) warfarin concentration. This
interaction can result in an unpredictable increase in INR and bleeding risk. The net effect may vary, so close INR
monitoring is essential. The INR may initially increase (not decrease). Seizure activity is managed by phenytoin but is
not affected by the interaction. The therapeutic effect of warfarin becomes unpredictable, which requires more intensive
monitoring rather than assuming an increased effect.
Q6: A client develops a rash, fever, and swollen lymph nodes 2 weeks after starting a new medication. The
nurse recognizes this as which type of adverse drug reaction?
A. Type I hypersensitivity (anaphylaxis)
B. Type III serum sickness reaction **[CORRECT]**
C. Type IV delayed hypersensitivity
D. Idiosyncratic reaction
Correct Answer: B
Rationale:
Serum sickness is a Type III hypersensitivity reaction characterized by fever, rash (urticaria or maculopapular),
arthralgia, and lymphadenopathy, typically occurring 1-3 weeks after drug exposure. It results from immune complex
deposition in tissues, complement activation, and inflammation. Type I reactions are immediate (anaphylaxis, urticaria)
and IgE-mediated. Type IV reactions are delayed (contact dermatitis, maculopapular rash) and T-cell mediated,
typically appearing 48-72 hours after exposure. Idiosyncratic reactions are unpredictable, genetically determined
abnormal responses to a drug. The nurse should report these findings and prepare to discontinue the offending
medication.
Q7: A client is starting metronidazole (Flagyl). Which instruction is most important for the nurse to include?
A. Take this medication with an antacid for best results.
B. Avoid consuming alcohol while taking this medication and for 48 hours after the last dose.
**[CORRECT]**
C. You may crush the extended-release tablets for easier swallowing.
D. Take this medication with a high-calcium food source.
Correct Answer: B
MIDTERM EXAM V2
70 Questions & Answers with Dosage Calculations | NGN Clinical Judgment Integrated
2026/2027 Updated | Pass Guaranteed - A+ Graded
, SECTION 1: PHARMACOLOGICAL FOUNDATIONS AND MEDICATION SAFETY
(Q1-Q10)
Q1: A client asks the nurse why a medication must be taken on an empty stomach. Which response is
best?
A. Taking it on an empty stomach improves distribution.
B. Food can delay or reduce the absorption of this medication. **[CORRECT]**
C. An empty stomach speeds up metabolism of the drug.
D. Food increases the excretion of this medication.
Correct Answer: B
Rationale:
Absorption is the process by which a drug moves from the site of administration into the bloodstream. Certain
medications have significantly reduced or delayed absorption when taken with food due to interactions with gastric pH,
chelation with dietary cations (e.g., fluoroquinolones with calcium), or delayed gastric emptying. Distribution refers to the
movement of drugs from the blood to tissues and is not directly affected by food intake. Metabolism occurs primarily in
the liver and is not directly affected by the presence or absence of food in the stomach. Excretion is the elimination of
drugs from the body, primarily through the kidneys, and is not affected by taking medications on an empty stomach.
Q2: A nurse is administering a beta-2 agonist bronchodilator. The nurse understands this medication has
which type of action at the receptor?
A. Partial agonist
B. Agonist **[CORRECT]**
C. Antagonist
D. Inverse agonist
Correct Answer: B
Rationale:
A beta-2 agonist binds to beta-2 adrenergic receptors and activates them, producing a physiological response
(bronchodilation). An agonist is a drug that binds to a receptor and produces the same type of response as the
endogenous substance. A partial agonist produces a submaximal response even when all receptors are occupied. An
antagonist binds to a receptor but does not produce a response and blocks the action of the agonist. An inverse agonist
binds to the same receptor as an agonist but produces the opposite effect. Understanding receptor pharmacology is
essential for predicting drug effects and adverse reactions.
Q3: Which of the following is one of the Six Rights of medication administration?
A. Right documentation **[CORRECT]**
B. Right room
C. Right family
D. Right diet
Correct Answer: A
Rationale:
The Six Rights of medication administration are: right client, right medication, right dose, right route, right time, and right
documentation. Right documentation is the sixth right and ensures that the medication administration is recorded in the
client's medical record, providing a legal record and promoting continuity of care. Right room, right family, and right diet
are not among the Six Rights, although other rights have been proposed in expanded versions. The nurse must verify
all Six Rights before, during, and after administering any medication to ensure client safety and prevent medication
errors.
Q4: Which medication is classified as a high-alert medication by the Institute for Safe Medication Practices
(ISMP)?
A. Acetaminophen (Tylenol)
, B. Warfarin (Coumadin) **[CORRECT]**
C. Diphenhydramine (Benadryl)
D. Omeprazole (Prilosec)
Correct Answer: B
Rationale:
High-alert medications are drugs that bear a heightened risk of causing significant patient harm when used in error. The
ISMP classifies anticoagulants (including warfarin, heparin, and direct oral anticoagulants) as high-alert medications
due to the serious bleeding risk associated with dosing errors. Acetaminophen, diphenhydramine, and omeprazole are
not classified as high-alert medications. While they can cause adverse effects, the consequences of errors are generally
less severe. Nurses must exercise additional safety precautions when administering high-alert medications, including
independent double-checks of doses and careful patient monitoring.
Q5: A client taking warfarin (Coumadin) is prescribed phenytoin (Dilantin). The nurse should monitor for
which effect?
A. Increased bleeding risk **[CORRECT]**
B. Decreased INR
C. Reduced seizure activity
D. Increased therapeutic effect of warfarin
Correct Answer: A
Rationale:
Phenytoin is a hepatic enzyme inducer (CYP450 inducer) that can increase the metabolism of warfarin, but it also
displaces warfarin from protein-binding sites, leading to a transient increase in free (active) warfarin concentration. This
interaction can result in an unpredictable increase in INR and bleeding risk. The net effect may vary, so close INR
monitoring is essential. The INR may initially increase (not decrease). Seizure activity is managed by phenytoin but is
not affected by the interaction. The therapeutic effect of warfarin becomes unpredictable, which requires more intensive
monitoring rather than assuming an increased effect.
Q6: A client develops a rash, fever, and swollen lymph nodes 2 weeks after starting a new medication. The
nurse recognizes this as which type of adverse drug reaction?
A. Type I hypersensitivity (anaphylaxis)
B. Type III serum sickness reaction **[CORRECT]**
C. Type IV delayed hypersensitivity
D. Idiosyncratic reaction
Correct Answer: B
Rationale:
Serum sickness is a Type III hypersensitivity reaction characterized by fever, rash (urticaria or maculopapular),
arthralgia, and lymphadenopathy, typically occurring 1-3 weeks after drug exposure. It results from immune complex
deposition in tissues, complement activation, and inflammation. Type I reactions are immediate (anaphylaxis, urticaria)
and IgE-mediated. Type IV reactions are delayed (contact dermatitis, maculopapular rash) and T-cell mediated,
typically appearing 48-72 hours after exposure. Idiosyncratic reactions are unpredictable, genetically determined
abnormal responses to a drug. The nurse should report these findings and prepare to discontinue the offending
medication.
Q7: A client is starting metronidazole (Flagyl). Which instruction is most important for the nurse to include?
A. Take this medication with an antacid for best results.
B. Avoid consuming alcohol while taking this medication and for 48 hours after the last dose.
**[CORRECT]**
C. You may crush the extended-release tablets for easier swallowing.
D. Take this medication with a high-calcium food source.
Correct Answer: B
