PHARMACOLOGY NURSING MIDTERM EXAM
COMPLETE REVIEW | 2026
Safe Medication Administration & Drug Therapy Competency | 100 Questions | 200 Points Total
Read each question carefully. Select the BEST answer. Each question is worth 2 points. Total: 200 points. Time: 120
minutes. Questions reflect NCSBN NCLEX-RN Pharmacological and Parenteral Therapies domain and ISMP High-
Alert Medication Guidelines.
Scoring Summary
Domain Questions Points Score
I. Pharmacokinetics & Pharmacodynamics 1–10 20 ____
Fundamentals
II. Medication Administration Principles 11–16 12 ____
III. Dosage Calculations & IV Therapy 17–22 12 ____
IV. Cardiovascular Pharmacology 23–34 24 ____
V. Respiratory Pharmacology 35–42 16 ____
VI. Endocrine Pharmacology 43–54 24 ____
VII. Antibiotics & Anti-Infectives 55–64 20 ____
VIII. Pain Management & CNS 65–76 24 ____
Pharmacology
IX. Psychiatric & Neurological Medications 77–83 14 ____
X. Gastrointestinal Pharmacology 84–89 12 ____
XI. Nursing Implications & Patient 90–94 10 ____
Education
XII. Legal/Ethical Standards in Medication 95–100 12 ____
Practice
TOTAL 1–100 200 ____
Domain I: Pharmacokinetics & Pharmacodynamics Fundamentals (1–10, 20 pts)
1. A drug with a high first-pass effect will have which characteristic?
A. Higher bioavailability when given orally B. Lower bioavailability when given orally
C. Rapid onset of action with oral administration D. No difference in bioavailability between routes
Answer: B. Lower bioavailability when given orally
Rationale: The first-pass effect refers to the metabolism of a drug by the liver before it reaches systemic
circulation after oral administration. This significantly reduces bioavailability, meaning a larger oral dose is needed
compared to IV. Drugs with high first-pass effect (e.g., morphine, propranolol, lidocaine) have much lower oral
bioavailability than parenteral bioavailability.
2. The nurse understands that a drug with a narrow therapeutic index requires which nursing action?
A. Administering the drug with meals
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, Pharmacology Nursing Midterm Exam | 2026
B. Monitoring drug levels closely and assessing for toxicity
C. Giving the drug at bedtime only
D. Administering the drug only via the oral route
Answer: B. Monitoring drug levels closely and assessing for toxicity
Rationale: A narrow therapeutic index means the difference between a therapeutic dose and a toxic dose is small.
Drugs with narrow TI (e.g., digoxin, lithium, warfarin, theophylline) require close monitoring of serum drug levels,
patient assessment for signs of toxicity, and precise dosing. Small changes in dose or patient status can lead to
toxicity.
3. It takes approximately how long for a drug to reach steady state if its half-life is 6 hours?
A. 6 hours B. 12 hours C. 24 to 30 hours D. 48 hours
Answer: C. 24 to 30 hours
Rationale: Steady state is achieved in approximately 4 to 5 half-lives. For a drug with a 6-hour half-life: 4 × 6 = 24
hours, 5 × 6 = 30 hours. At steady state, the rate of drug administration equals the rate of elimination, and drug
levels remain relatively constant. This principle guides dosing intervals and informs the nurse when to draw
peak/trough levels.
4. Which term describes the time it takes for a drug to produce its therapeutic effect after administration?
A. Duration B. Peak action C. Onset of action D. Half-life
Answer: C. Onset of action
Rationale: Onset of action is the time from drug administration until the first observable therapeutic effect. Peak
action is when the drug reaches its maximum concentration and effect. Duration is the length of time the drug
produces a therapeutic effect. Half-life is the time required for 50% of the drug to be eliminated.
5. A patient asks the nurse why a medication must be given intravenously instead of by mouth. Which response by
the nurse best explains the pharmacokinetic rationale?
A. IV medications work faster because they bypass the GI tract.
B. IV medications have a higher first-pass effect than oral medications.
C. IV medications are absorbed through the intestinal mucosa.
D. IV medications are metabolized slower than oral medications.
Answer: A. IV medications work faster because they bypass the GI tract.
Rationale: The intravenous route provides 100% bioavailability because the drug is injected directly into the
bloodstream, bypassing the absorption phase and the first-pass hepatic metabolism that occurs with oral
administration. IV drugs have immediate onset of action, which is critical in emergencies. Oral medications must
be absorbed through the GI tract and metabolized by the liver first.
6. An agonist medication acts on a receptor by which mechanism?
A. Blocking the receptor to prevent a response
B. Binding to the receptor and producing a response
C. Inhibiting the enzyme that degrades the neurotransmitter
D. Competing with the endogenous substance for absorption
Answer: B. Binding to the receptor and producing a response
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, Pharmacology Nursing Midterm Exam | 2026
Rationale: An agonist is a drug that binds to a receptor and stimulates (mimics) the response that the endogenous
substance would produce. An antagonist blocks the receptor and prevents the response. A partial agonist produces a
submaximal response even when all receptors are occupied. Understanding receptor pharmacology is essential for
predicting drug effects and adverse reactions.
7. Which factor most significantly affects drug distribution in the body?
A. Drug color B. Protein binding in the C. Drug taste D. Container material
blood
Answer: B. Protein binding in the blood
Rationale: Protein binding is a major factor in drug distribution. Drugs bound to plasma proteins (mainly albumin)
are pharmacologically inactive and cannot cross cell membranes. Only the free (unbound) drug is active and
available for distribution to tissues, metabolism, and excretion. Highly protein-bound drugs have a longer duration
of action and can be displaced by other protein-bound drugs.
8. The nurse is caring for a patient with impaired renal function. Which pharmacokinetic phase will be most
affected?
A. Absorption B. Distribution C. Metabolism D. Excretion
Answer: D. Excretion
Rationale: The kidneys are the primary organ for drug excretion. Impaired renal function reduces the clearance of
drugs eliminated renally, leading to drug accumulation and potential toxicity. Nurses must assess renal function
(e.g., creatinine clearance, GFR) and collaborate with providers to adjust drug doses for patients with renal
impairment.
9. When two drugs produce an effect greater than the sum of their individual effects, this interaction is termed:
A. Additive B. Synergistic C. Antagonistic D. Potentiated
Answer: B. Synergistic
Rationale: A synergistic drug interaction occurs when the combined effect of two drugs is greater than the sum of
their individual effects (1 + 1 > 2). Additive effects mean the combined effect equals the sum of individual effects
(1 + 1 = 2). Antagonistic effects mean one drug reduces or blocks the effect of another. Synergism can be
therapeutic (e.g., sulfamethoxazole + trimethoprim) or lead to increased toxicity.
10. The blood-brain barrier (BBB) is significant in pharmacology because it:
A. Allows all drugs to easily reach the CNS
B. Prevents drugs with large molecular weight or high lipid solubility from crossing
C. Limits access of many drugs to the central nervous system
D. Only affects intravenous medications
Answer: C. Limits access of many drugs to the central nervous system
Rationale: The blood-brain barrier is a selectively permeable membrane that protects the CNS from potentially
harmful substances in the blood. It limits the passage of many drugs, especially large, water-soluble (hydrophilic),
or ionized molecules. Only small, lipid-soluble (lipophilic) drugs can easily cross the BBB. This has implications
for treating CNS infections and neurological disorders.
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, Pharmacology Nursing Midterm Exam | 2026
Domain II: Medication Administration Principles (11–16, 12 pts)
11. Which of the 'eight rights' of medication administration refers to documenting the patient's response to the
medication?
A. Right documentation B. Right response C. Right reason D. Right evaluation
Answer: B. Right response
Rationale: The eight rights of medication administration are: Right Patient, Right Drug, Right Dose, Right Route,
Right Time, Right Documentation, Right Reason, and Right Response. Right Response refers to evaluating and
documenting the patient's response to the medication, including both therapeutic effects and adverse reactions.
12. The nurse should perform an independent double-check for which medication?
A. Acetaminophen B. Regular insulin C. Potassium chloride IV D. Lisinopril
Answer: C. Potassium chloride IV
Rationale: According to ISMP High-Alert Medication Guidelines, independent double-checks are required for
high-alert medications such as IV potassium chloride, insulin, heparin, opioids, and chemotherapy. An independent
double-check means two qualified individuals separately verify the right drug, dose, route, and patient. Potassium
chloride IV is particularly dangerous because rapid infusion can cause fatal cardiac arrhythmias.
13. Which route of administration has the fastest onset of action?
A. Oral (PO) B. Sublingual (SL) C. Intravenous (IV) D. Subcutaneous (SQ)
Answer: C. Intravenous (IV)
Rationale: Intravenous administration provides the fastest onset because the drug is delivered directly into the
bloodstream, achieving 100% bioavailability. The onset hierarchy from fastest to slowest is: IV > intramuscular >
subcutaneous > sublingual > oral > topical/transdermal. IV administration is used in emergencies when rapid drug
effect is needed.
14. The nurse is using a barcode medication administration (BCMA) system. Which action should the nurse take
first?
A. Scan the medication barcode B. Scan the patient's wristband
C. Verify the medication visually D. Administer the medication to the patient
Answer: B. Scan the patient's wristband
Rationale: When using BCMA, the nurse should first scan the patient's wristband to identify the correct patient,
then scan the medication to verify it matches the order. The system will alert the nurse if there is a mismatch. This
technology is a key safety measure that reduces medication errors by ensuring the five rights at the point of care.
15. Which of the following best describes the purpose of medication reconciliation?
A. To count narcotics at the end of each shift
B. To compare home medications with newly ordered medications
C. To determine the cost of medications for insurance
D. To verify the expiration date of medications
Answer: B. To compare home medications with newly ordered medications
Page 4
COMPLETE REVIEW | 2026
Safe Medication Administration & Drug Therapy Competency | 100 Questions | 200 Points Total
Read each question carefully. Select the BEST answer. Each question is worth 2 points. Total: 200 points. Time: 120
minutes. Questions reflect NCSBN NCLEX-RN Pharmacological and Parenteral Therapies domain and ISMP High-
Alert Medication Guidelines.
Scoring Summary
Domain Questions Points Score
I. Pharmacokinetics & Pharmacodynamics 1–10 20 ____
Fundamentals
II. Medication Administration Principles 11–16 12 ____
III. Dosage Calculations & IV Therapy 17–22 12 ____
IV. Cardiovascular Pharmacology 23–34 24 ____
V. Respiratory Pharmacology 35–42 16 ____
VI. Endocrine Pharmacology 43–54 24 ____
VII. Antibiotics & Anti-Infectives 55–64 20 ____
VIII. Pain Management & CNS 65–76 24 ____
Pharmacology
IX. Psychiatric & Neurological Medications 77–83 14 ____
X. Gastrointestinal Pharmacology 84–89 12 ____
XI. Nursing Implications & Patient 90–94 10 ____
Education
XII. Legal/Ethical Standards in Medication 95–100 12 ____
Practice
TOTAL 1–100 200 ____
Domain I: Pharmacokinetics & Pharmacodynamics Fundamentals (1–10, 20 pts)
1. A drug with a high first-pass effect will have which characteristic?
A. Higher bioavailability when given orally B. Lower bioavailability when given orally
C. Rapid onset of action with oral administration D. No difference in bioavailability between routes
Answer: B. Lower bioavailability when given orally
Rationale: The first-pass effect refers to the metabolism of a drug by the liver before it reaches systemic
circulation after oral administration. This significantly reduces bioavailability, meaning a larger oral dose is needed
compared to IV. Drugs with high first-pass effect (e.g., morphine, propranolol, lidocaine) have much lower oral
bioavailability than parenteral bioavailability.
2. The nurse understands that a drug with a narrow therapeutic index requires which nursing action?
A. Administering the drug with meals
Page 1
, Pharmacology Nursing Midterm Exam | 2026
B. Monitoring drug levels closely and assessing for toxicity
C. Giving the drug at bedtime only
D. Administering the drug only via the oral route
Answer: B. Monitoring drug levels closely and assessing for toxicity
Rationale: A narrow therapeutic index means the difference between a therapeutic dose and a toxic dose is small.
Drugs with narrow TI (e.g., digoxin, lithium, warfarin, theophylline) require close monitoring of serum drug levels,
patient assessment for signs of toxicity, and precise dosing. Small changes in dose or patient status can lead to
toxicity.
3. It takes approximately how long for a drug to reach steady state if its half-life is 6 hours?
A. 6 hours B. 12 hours C. 24 to 30 hours D. 48 hours
Answer: C. 24 to 30 hours
Rationale: Steady state is achieved in approximately 4 to 5 half-lives. For a drug with a 6-hour half-life: 4 × 6 = 24
hours, 5 × 6 = 30 hours. At steady state, the rate of drug administration equals the rate of elimination, and drug
levels remain relatively constant. This principle guides dosing intervals and informs the nurse when to draw
peak/trough levels.
4. Which term describes the time it takes for a drug to produce its therapeutic effect after administration?
A. Duration B. Peak action C. Onset of action D. Half-life
Answer: C. Onset of action
Rationale: Onset of action is the time from drug administration until the first observable therapeutic effect. Peak
action is when the drug reaches its maximum concentration and effect. Duration is the length of time the drug
produces a therapeutic effect. Half-life is the time required for 50% of the drug to be eliminated.
5. A patient asks the nurse why a medication must be given intravenously instead of by mouth. Which response by
the nurse best explains the pharmacokinetic rationale?
A. IV medications work faster because they bypass the GI tract.
B. IV medications have a higher first-pass effect than oral medications.
C. IV medications are absorbed through the intestinal mucosa.
D. IV medications are metabolized slower than oral medications.
Answer: A. IV medications work faster because they bypass the GI tract.
Rationale: The intravenous route provides 100% bioavailability because the drug is injected directly into the
bloodstream, bypassing the absorption phase and the first-pass hepatic metabolism that occurs with oral
administration. IV drugs have immediate onset of action, which is critical in emergencies. Oral medications must
be absorbed through the GI tract and metabolized by the liver first.
6. An agonist medication acts on a receptor by which mechanism?
A. Blocking the receptor to prevent a response
B. Binding to the receptor and producing a response
C. Inhibiting the enzyme that degrades the neurotransmitter
D. Competing with the endogenous substance for absorption
Answer: B. Binding to the receptor and producing a response
Page 2
, Pharmacology Nursing Midterm Exam | 2026
Rationale: An agonist is a drug that binds to a receptor and stimulates (mimics) the response that the endogenous
substance would produce. An antagonist blocks the receptor and prevents the response. A partial agonist produces a
submaximal response even when all receptors are occupied. Understanding receptor pharmacology is essential for
predicting drug effects and adverse reactions.
7. Which factor most significantly affects drug distribution in the body?
A. Drug color B. Protein binding in the C. Drug taste D. Container material
blood
Answer: B. Protein binding in the blood
Rationale: Protein binding is a major factor in drug distribution. Drugs bound to plasma proteins (mainly albumin)
are pharmacologically inactive and cannot cross cell membranes. Only the free (unbound) drug is active and
available for distribution to tissues, metabolism, and excretion. Highly protein-bound drugs have a longer duration
of action and can be displaced by other protein-bound drugs.
8. The nurse is caring for a patient with impaired renal function. Which pharmacokinetic phase will be most
affected?
A. Absorption B. Distribution C. Metabolism D. Excretion
Answer: D. Excretion
Rationale: The kidneys are the primary organ for drug excretion. Impaired renal function reduces the clearance of
drugs eliminated renally, leading to drug accumulation and potential toxicity. Nurses must assess renal function
(e.g., creatinine clearance, GFR) and collaborate with providers to adjust drug doses for patients with renal
impairment.
9. When two drugs produce an effect greater than the sum of their individual effects, this interaction is termed:
A. Additive B. Synergistic C. Antagonistic D. Potentiated
Answer: B. Synergistic
Rationale: A synergistic drug interaction occurs when the combined effect of two drugs is greater than the sum of
their individual effects (1 + 1 > 2). Additive effects mean the combined effect equals the sum of individual effects
(1 + 1 = 2). Antagonistic effects mean one drug reduces or blocks the effect of another. Synergism can be
therapeutic (e.g., sulfamethoxazole + trimethoprim) or lead to increased toxicity.
10. The blood-brain barrier (BBB) is significant in pharmacology because it:
A. Allows all drugs to easily reach the CNS
B. Prevents drugs with large molecular weight or high lipid solubility from crossing
C. Limits access of many drugs to the central nervous system
D. Only affects intravenous medications
Answer: C. Limits access of many drugs to the central nervous system
Rationale: The blood-brain barrier is a selectively permeable membrane that protects the CNS from potentially
harmful substances in the blood. It limits the passage of many drugs, especially large, water-soluble (hydrophilic),
or ionized molecules. Only small, lipid-soluble (lipophilic) drugs can easily cross the BBB. This has implications
for treating CNS infections and neurological disorders.
Page 3
, Pharmacology Nursing Midterm Exam | 2026
Domain II: Medication Administration Principles (11–16, 12 pts)
11. Which of the 'eight rights' of medication administration refers to documenting the patient's response to the
medication?
A. Right documentation B. Right response C. Right reason D. Right evaluation
Answer: B. Right response
Rationale: The eight rights of medication administration are: Right Patient, Right Drug, Right Dose, Right Route,
Right Time, Right Documentation, Right Reason, and Right Response. Right Response refers to evaluating and
documenting the patient's response to the medication, including both therapeutic effects and adverse reactions.
12. The nurse should perform an independent double-check for which medication?
A. Acetaminophen B. Regular insulin C. Potassium chloride IV D. Lisinopril
Answer: C. Potassium chloride IV
Rationale: According to ISMP High-Alert Medication Guidelines, independent double-checks are required for
high-alert medications such as IV potassium chloride, insulin, heparin, opioids, and chemotherapy. An independent
double-check means two qualified individuals separately verify the right drug, dose, route, and patient. Potassium
chloride IV is particularly dangerous because rapid infusion can cause fatal cardiac arrhythmias.
13. Which route of administration has the fastest onset of action?
A. Oral (PO) B. Sublingual (SL) C. Intravenous (IV) D. Subcutaneous (SQ)
Answer: C. Intravenous (IV)
Rationale: Intravenous administration provides the fastest onset because the drug is delivered directly into the
bloodstream, achieving 100% bioavailability. The onset hierarchy from fastest to slowest is: IV > intramuscular >
subcutaneous > sublingual > oral > topical/transdermal. IV administration is used in emergencies when rapid drug
effect is needed.
14. The nurse is using a barcode medication administration (BCMA) system. Which action should the nurse take
first?
A. Scan the medication barcode B. Scan the patient's wristband
C. Verify the medication visually D. Administer the medication to the patient
Answer: B. Scan the patient's wristband
Rationale: When using BCMA, the nurse should first scan the patient's wristband to identify the correct patient,
then scan the medication to verify it matches the order. The system will alert the nurse if there is a mismatch. This
technology is a key safety measure that reduces medication errors by ensuring the five rights at the point of care.
15. Which of the following best describes the purpose of medication reconciliation?
A. To count narcotics at the end of each shift
B. To compare home medications with newly ordered medications
C. To determine the cost of medications for insurance
D. To verify the expiration date of medications
Answer: B. To compare home medications with newly ordered medications
Page 4
