NSG124 / NSG 124 Exam 1: Pharmacology (Herzing)
Actual Exam 2026/2027 | Complete Exam-Style Questions
with Detailed Rationales | 100% Verified — Pass
Guaranteed – A+ Graded
Section 1: Foundations of Pharmacology and Medication Safety
Q1: A nursing student is reviewing the pharmacokinetics of a newly prescribed medication
and asks the instructor to explain the concept of a drug's half-life. Which statement by the
student indicates a correct understanding of this principle?
A. It is the total amount of time required for the drug to be completely eliminated from the
body.
B. It is the time it takes for the concentration of the drug in the plasma to decrease by 50%.
[CORRECT]
C. It represents the peak plasma concentration achieved after a single oral dose.
D. It is the time required for the drug to reach a steady state in the patient's tissues.
Correct Answer: B
Rationale: This choice is correct because the half-life specifically defines the duration
required for the body to metabolize and eliminate half of the active drug concentration in
the bloodstream, which guides dosing intervals.
Q2: The nurse is preparing to administer a high-alert medication, intravenous potassium
chloride. According to standard medication safety protocols, what is the most critical action
the nurse must take before administration?
A. Administer the medication via rapid IV push to ensure immediate therapeutic effect.
B. Mix the potassium chloride directly into the patient's existing continuous fluid bag.
C. Require an independent double-check with a second licensed nurse against the original
order. [CORRECT]
D. Verify the patient's allergy status using only the patient's wristband barcode.
Correct Answer: C
Rationale: The best answer is C because high-alert medications carry a significant risk of
causing severe harm or death if given in error, making an independent double-check by a
second licensed professional a mandatory safety standard.
Q3: A patient with end-stage liver cirrhosis is prescribed a medication that is heavily
metabolized by the hepatic cytochrome P450 enzyme system. What pharmacokinetic
change should the nurse anticipate for this patient?
A. Increased risk of drug toxicity due to decreased first-pass metabolism. [CORRECT]
B. Faster drug elimination requiring higher and more frequent doses.
C. Enhanced protein binding leading to lower levels of free, active drug in the blood.
D. Rapid distribution into adipose tissue resulting in a shortened duration of action.
Correct Answer: A
, Rationale: This matches the principle that impaired liver function significantly reduces the
first-pass effect and overall metabolic clearance, leading to drug accumulation and a much
higher risk of toxicity.
Q4: A provider orders cefazolin 500 mg IM every 8 hours. The pharmacy supplies a vial
containing 1 gram of powdered cefazolin. The reconstitution instructions state to add 2.5
mL of sterile water to yield a concentration of 330 mg/mL. How many milliliters will the
nurse draw up for a single dose?
A. 1.0 mL
B. 1.5 mL [CORRECT]
C. 2.0 mL
D. 2.5 mL
Correct Answer: B
Rationale: This choice is correct because dividing the ordered dose of 500 mg by the
available concentration of 330 mg/mL equals approximately 1.5 mL, which is the exact
volume needed for the injection.
Q5: A patient is receiving a medication classified as a beta-adrenergic antagonist. The nurse
understands that this drug will produce its therapeutic effect by which mechanism of
action?
A. Initiating a maximal cellular response by fully activating the receptor.
B. Binding to the receptor and causing a moderate, partial cellular response.
C. Destroying the receptor sites permanently to prevent endogenous binding.
D. Blocking endogenous agonists from binding to the receptor, thereby inhibiting a
response. [CORRECT]
Correct Answer: D
Rationale: The best answer is D because an antagonist acts as a receptor blocker, preventing
natural chemicals like epinephrine or norepinephrine from attaching and triggering their
usual physiological effects.
Q6: Before administering a scheduled morning medication, the nurse asks the patient to
state their full name and date of birth. The patient responds correctly, but the nurse notices
the physical wristband is missing. What is the safest next step?
A. Verify the patient's identity using a second reliable identifier, such as checking the active
medical record photo or asking a family member at the bedside, before giving the drug.
[CORRECT]
B. Administer the medication since the patient verbally confirmed their identity accurately.
C. Hold the medication and wait until the pharmacy can print a new barcode wristband.
D. Ask the patient's roommate to confirm the patient's identity and then proceed with
administration.
Correct Answer: A
Rationale: This aligns with the "Right Patient" principle, which dictates that if a primary
identifier like a wristband is missing or unreadable, the nurse must immediately use an
alternative, reliable secondary identifier to prevent a medication error.
Actual Exam 2026/2027 | Complete Exam-Style Questions
with Detailed Rationales | 100% Verified — Pass
Guaranteed – A+ Graded
Section 1: Foundations of Pharmacology and Medication Safety
Q1: A nursing student is reviewing the pharmacokinetics of a newly prescribed medication
and asks the instructor to explain the concept of a drug's half-life. Which statement by the
student indicates a correct understanding of this principle?
A. It is the total amount of time required for the drug to be completely eliminated from the
body.
B. It is the time it takes for the concentration of the drug in the plasma to decrease by 50%.
[CORRECT]
C. It represents the peak plasma concentration achieved after a single oral dose.
D. It is the time required for the drug to reach a steady state in the patient's tissues.
Correct Answer: B
Rationale: This choice is correct because the half-life specifically defines the duration
required for the body to metabolize and eliminate half of the active drug concentration in
the bloodstream, which guides dosing intervals.
Q2: The nurse is preparing to administer a high-alert medication, intravenous potassium
chloride. According to standard medication safety protocols, what is the most critical action
the nurse must take before administration?
A. Administer the medication via rapid IV push to ensure immediate therapeutic effect.
B. Mix the potassium chloride directly into the patient's existing continuous fluid bag.
C. Require an independent double-check with a second licensed nurse against the original
order. [CORRECT]
D. Verify the patient's allergy status using only the patient's wristband barcode.
Correct Answer: C
Rationale: The best answer is C because high-alert medications carry a significant risk of
causing severe harm or death if given in error, making an independent double-check by a
second licensed professional a mandatory safety standard.
Q3: A patient with end-stage liver cirrhosis is prescribed a medication that is heavily
metabolized by the hepatic cytochrome P450 enzyme system. What pharmacokinetic
change should the nurse anticipate for this patient?
A. Increased risk of drug toxicity due to decreased first-pass metabolism. [CORRECT]
B. Faster drug elimination requiring higher and more frequent doses.
C. Enhanced protein binding leading to lower levels of free, active drug in the blood.
D. Rapid distribution into adipose tissue resulting in a shortened duration of action.
Correct Answer: A
, Rationale: This matches the principle that impaired liver function significantly reduces the
first-pass effect and overall metabolic clearance, leading to drug accumulation and a much
higher risk of toxicity.
Q4: A provider orders cefazolin 500 mg IM every 8 hours. The pharmacy supplies a vial
containing 1 gram of powdered cefazolin. The reconstitution instructions state to add 2.5
mL of sterile water to yield a concentration of 330 mg/mL. How many milliliters will the
nurse draw up for a single dose?
A. 1.0 mL
B. 1.5 mL [CORRECT]
C. 2.0 mL
D. 2.5 mL
Correct Answer: B
Rationale: This choice is correct because dividing the ordered dose of 500 mg by the
available concentration of 330 mg/mL equals approximately 1.5 mL, which is the exact
volume needed for the injection.
Q5: A patient is receiving a medication classified as a beta-adrenergic antagonist. The nurse
understands that this drug will produce its therapeutic effect by which mechanism of
action?
A. Initiating a maximal cellular response by fully activating the receptor.
B. Binding to the receptor and causing a moderate, partial cellular response.
C. Destroying the receptor sites permanently to prevent endogenous binding.
D. Blocking endogenous agonists from binding to the receptor, thereby inhibiting a
response. [CORRECT]
Correct Answer: D
Rationale: The best answer is D because an antagonist acts as a receptor blocker, preventing
natural chemicals like epinephrine or norepinephrine from attaching and triggering their
usual physiological effects.
Q6: Before administering a scheduled morning medication, the nurse asks the patient to
state their full name and date of birth. The patient responds correctly, but the nurse notices
the physical wristband is missing. What is the safest next step?
A. Verify the patient's identity using a second reliable identifier, such as checking the active
medical record photo or asking a family member at the bedside, before giving the drug.
[CORRECT]
B. Administer the medication since the patient verbally confirmed their identity accurately.
C. Hold the medication and wait until the pharmacy can print a new barcode wristband.
D. Ask the patient's roommate to confirm the patient's identity and then proceed with
administration.
Correct Answer: A
Rationale: This aligns with the "Right Patient" principle, which dictates that if a primary
identifier like a wristband is missing or unreadable, the nurse must immediately use an
alternative, reliable secondary identifier to prevent a medication error.
