HESI RN Pharmacology Proctored Exam –
2026/2027 Edition – Original HESI-Style
Practice Questions with Verified Answers and
Detailed Clinical Rationales | with complete
solutions.
SECTION 1: PHARMACOKINETICS AND
PHARMACODYNAMICS (Questions 1-10)
1. A 28-year-old female patient in the intensive care unit is
prescribed a medication with a narrow therapeutic index. The nurse
prepares to draw blood samples to monitor drug toxicity. To
accurately assess the trough level, the nurse should schedule the
blood draw at what time?
A) Immediately before the administration of the next scheduled dose
B) Thirty minutes after the intravenous infusion completes
C) Exactly one hour after the patient reports therapeutic relief
D) At the midpoint between the current and the next dose
Answer: A) Immediately before the administration of the next
scheduled dose
Rationale: Trough levels represent the lowest concentration of the drug in
the patient's bloodstream and must be drawn immediately before the next
dose to ensure it remains within the therapeutic window. This is especially
critical for drugs with a narrow therapeutic index to prevent toxicity.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
,2. The provider orders an oral medication for a 31-year-old male in
the oncology ward. The drug is known to have a high first-pass
effect. The nurse anticipates that the oral dosage will compare to an
intravenous dose in what manner?
A) The oral dose will be identical to the intravenous dose
B) The oral dose will be significantly higher than the intravenous dose
C) The oral dose will be significantly lower than the intravenous dose
D) The oral dose will be administered more frequently than the intravenous
dose
Answer: B) The oral dose will be significantly higher than the
intravenous dose
Rationale: Drugs with a high first-pass effect are extensively metabolized by
the liver before reaching systemic circulation, requiring higher oral doses to
achieve the same therapeutic effect as IV administration, which bypasses
this metabolism.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
3. A 46-year-old male patient in the emergency department is
started on a new continuous intravenous infusion. The nurse knows
that steady-state concentration will be achieved after
approximately how many half-lives?
A) Immediately upon starting the continuous infusion
B) Seven to eight half-lives
C) Four to five half-lives
D) One to two half-lives
,Answer: C) Four to five half-lives
Rationale: Steady-state concentration occurs when the rate of drug
administration equals the rate of elimination, which typically takes 4 to 5
half-lives of the medication.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
4. A 60-year-old female patient in the outpatient clinic is severely
malnourished and has a low serum albumin level. The nurse is
administering a highly protein-bound medication. What is the most
critical assessment for this patient?
A) Assessing for signs of sudden allergic reaction or anaphylaxis
B) Evaluating for delayed absorption from the gastrointestinal tract
C) Monitoring for a decreased therapeutic response to the medication
D) Observing for signs of drug toxicity due to increased free drug levels
Answer: D) Observing for signs of drug toxicity due to increased free
drug levels
Rationale: When serum albumin is low, highly protein-bound drugs have
fewer binding sites, resulting in a higher concentration of free, active drug in
the blood, which increases the risk of toxicity.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
5. An 82-year-old female patient with severe cirrhosis is admitted to
the intensive care unit. The nurse reviews the patient's medication
list. Which pharmacokinetic process is most likely to be significantly
impaired?
A) Metabolism of the medication
B) Absorption of the medication
, C) Distribution of the medication
D) Excretion of the medication through the kidneys
Answer: A) Metabolism of the medication
Rationale: The liver is the primary site of drug metabolism. Severe liver
disease, such as cirrhosis, significantly impairs the organ's ability to
metabolize drugs, leading to prolonged drug action and potential toxicity.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
6. A client is prescribed a medication that is known to be highly
protein-bound. Which assessment finding would indicate the client
is at risk for increased drug effects?
A) Serum albumin 2.8 g/dL
B) Serum creatinine 1.2 mg/dL
C) Serum potassium 3.5 mEq/L
D) Hemoglobin 12 g/dL
Answer: A) Serum albumin 2.8 g/dL
Rationale: Low serum albumin (normal 3.5-5.0 g/dL) means fewer protein-
binding sites are available, leading to higher free drug levels and increased
risk of toxicity. Clients with hypoalbuminemia should be monitored closely
for adverse effects.
Source: HESI Pharmacology Study Guide 2026/2027
2026/2027 Edition – Original HESI-Style
Practice Questions with Verified Answers and
Detailed Clinical Rationales | with complete
solutions.
SECTION 1: PHARMACOKINETICS AND
PHARMACODYNAMICS (Questions 1-10)
1. A 28-year-old female patient in the intensive care unit is
prescribed a medication with a narrow therapeutic index. The nurse
prepares to draw blood samples to monitor drug toxicity. To
accurately assess the trough level, the nurse should schedule the
blood draw at what time?
A) Immediately before the administration of the next scheduled dose
B) Thirty minutes after the intravenous infusion completes
C) Exactly one hour after the patient reports therapeutic relief
D) At the midpoint between the current and the next dose
Answer: A) Immediately before the administration of the next
scheduled dose
Rationale: Trough levels represent the lowest concentration of the drug in
the patient's bloodstream and must be drawn immediately before the next
dose to ensure it remains within the therapeutic window. This is especially
critical for drugs with a narrow therapeutic index to prevent toxicity.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
,2. The provider orders an oral medication for a 31-year-old male in
the oncology ward. The drug is known to have a high first-pass
effect. The nurse anticipates that the oral dosage will compare to an
intravenous dose in what manner?
A) The oral dose will be identical to the intravenous dose
B) The oral dose will be significantly higher than the intravenous dose
C) The oral dose will be significantly lower than the intravenous dose
D) The oral dose will be administered more frequently than the intravenous
dose
Answer: B) The oral dose will be significantly higher than the
intravenous dose
Rationale: Drugs with a high first-pass effect are extensively metabolized by
the liver before reaching systemic circulation, requiring higher oral doses to
achieve the same therapeutic effect as IV administration, which bypasses
this metabolism.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
3. A 46-year-old male patient in the emergency department is
started on a new continuous intravenous infusion. The nurse knows
that steady-state concentration will be achieved after
approximately how many half-lives?
A) Immediately upon starting the continuous infusion
B) Seven to eight half-lives
C) Four to five half-lives
D) One to two half-lives
,Answer: C) Four to five half-lives
Rationale: Steady-state concentration occurs when the rate of drug
administration equals the rate of elimination, which typically takes 4 to 5
half-lives of the medication.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
4. A 60-year-old female patient in the outpatient clinic is severely
malnourished and has a low serum albumin level. The nurse is
administering a highly protein-bound medication. What is the most
critical assessment for this patient?
A) Assessing for signs of sudden allergic reaction or anaphylaxis
B) Evaluating for delayed absorption from the gastrointestinal tract
C) Monitoring for a decreased therapeutic response to the medication
D) Observing for signs of drug toxicity due to increased free drug levels
Answer: D) Observing for signs of drug toxicity due to increased free
drug levels
Rationale: When serum albumin is low, highly protein-bound drugs have
fewer binding sites, resulting in a higher concentration of free, active drug in
the blood, which increases the risk of toxicity.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
5. An 82-year-old female patient with severe cirrhosis is admitted to
the intensive care unit. The nurse reviews the patient's medication
list. Which pharmacokinetic process is most likely to be significantly
impaired?
A) Metabolism of the medication
B) Absorption of the medication
, C) Distribution of the medication
D) Excretion of the medication through the kidneys
Answer: A) Metabolism of the medication
Rationale: The liver is the primary site of drug metabolism. Severe liver
disease, such as cirrhosis, significantly impairs the organ's ability to
metabolize drugs, leading to prolonged drug action and potential toxicity.
Source: HESI Advanced Pharmacology RN Exam 2026/2027
6. A client is prescribed a medication that is known to be highly
protein-bound. Which assessment finding would indicate the client
is at risk for increased drug effects?
A) Serum albumin 2.8 g/dL
B) Serum creatinine 1.2 mg/dL
C) Serum potassium 3.5 mEq/L
D) Hemoglobin 12 g/dL
Answer: A) Serum albumin 2.8 g/dL
Rationale: Low serum albumin (normal 3.5-5.0 g/dL) means fewer protein-
binding sites are available, leading to higher free drug levels and increased
risk of toxicity. Clients with hypoalbuminemia should be monitored closely
for adverse effects.
Source: HESI Pharmacology Study Guide 2026/2027
