ATI Pharmacology 2026/2027 | ACTUAL-Style Practice Questions
& Answers, ATI RN Pharmacology Exam Prep, Medication
Administration, Drug Classifications, Side Effects,
Contraindications, Nursing Interventions, and Detailed Rationales
Question 1: A nurse is preparing to administer a medication to a client
who has a history of renal failure. Which pharmacokinetic process
should the nurse expect to be most affected?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
CORRECT ANSWER: D. Excretion
Rationale: The kidneys are the primary organs responsible for the excretion
of drugs and their metabolites. Impaired renal function leads to decreased
drug clearance and a high risk for toxicity. While the liver primarily handles
metabolism, renal failure directly impacts the elimination of drugs and
their active metabolites from the body.
Question 2: A nurse is preparing to administer 0.5 g of a medication.
The available dose is 250 mg tablets. How many tablets should the
nurse administer?
A. 0.5 tablet
B. 1 tablet
C. 2 tablets
D. 4 tablets
CORRECT ANSWER: C. 2 tablets
Rationale: First, convert grams to milligrams: 0.5 g = 500 mg. Then, divide
the ordered dose by the available dose: 500 mg ÷ 250 mg = 2 tablets. This
calculation ensures the client receives the prescribed amount of
medication.
Question 3: A nurse is reviewing a client's medication record and notes
a prescription for a "trough level." When should the nurse schedule the
blood draw?
A. 30 minutes after the dose is administered
B. Exactly mid-way between doses
,C. 15 minutes before the next dose
D. 2 hours after the start of the infusion
CORRECT ANSWER: C. 15 minutes before the next dose
Rationale: The trough level represents the lowest concentration of the drug
in the bloodstream. It is measured immediately (usually 15–30 minutes)
before the next scheduled dose to determine if the drug level is within the
therapeutic range and not accumulating to toxic levels.
Question 4: A nurse is preparing to administer an intramuscular (IM)
injection to an adult client who has a BMI of 32. Which needle length
should the nurse select?
A. 5/8 inch
B. 1 inch
C. 1 1/2 inches
D. 2 inches
CORRECT ANSWER: C. 1 1/2 inches
Rationale: For an obese client (BMI > 30), a longer needle (1.5 inches) is
required to ensure the medication reaches the muscle tissue rather than
staying in the subcutaneous fat layer. A 5/8-inch or 1-inch needle may only
reach subcutaneous tissue in this client, delaying absorption.
Question 5: A nurse is preparing to administer phenobarbital to a client.
Which pharmacokinetic concept explains why this drug has a long
duration of action?
A. First-pass effect
B. High lipid solubility
C. Protein binding
D. Half-life
CORRECT ANSWER: D. Half-life
Rationale: Half-life is the time it takes for the concentration of a drug in the
body to reduce by 50%. Phenobarbital has a long half-life, meaning it stays
in the system longer and requires less frequent dosing. While lipid solubility
affects distribution, the duration of action is primarily determined by the
half-life.
,Question 6: A nurse is teaching a client about the "First-pass effect."
Which route of administration is most affected by this process?
A. Intravenous
B. Sublingual
C. Oral
D. Transdermal
CORRECT ANSWER: C. Oral
Rationale: Oral medications are absorbed in the GI tract and travel to the
liver via the portal vein before reaching systemic circulation. The liver may
metabolize a large portion of the drug, reducing its bioavailability.
Intravenous, sublingual, and transdermal routes bypass the first-pass
effect.
Question 7: A nurse is calculating the IV flow rate for a client who is to
receive 1,000 mL of 0.9% Sodium Chloride over 8 hours. The drop factor
is 15 gtt/mL. What is the flow rate in gtt/min? (Round to the nearest
whole number).
A. 21 gtt/min
B. 31 gtt/min
C. 42 gtt/min
D. 63 gtt/min
CORRECT ANSWER: B. 31 gtt/min
Rationale: Total volume (1,000 mL) × Drop factor (15) ÷ Total time in
minutes (480 min) = 31.25. Rounded to the nearest whole number is 31
gtt/min. This calculation ensures the IV fluid infuses at the prescribed rate.
Question 8: A nurse is reviewing a prescription for a medication to be
given "AC." When should the nurse administer this drug?
A. After meals
B. Before meals
C. At bedtime
D. As needed
CORRECT ANSWER: B. Before meals
Rationale: The abbreviation "AC" stands for ante cibum, which means
"before meals." The nurse should administer the medication 30 minutes to
, 1 hour before meals. "PC" stands for post cibum (after meals), "HS" stands
for hora somni (at bedtime), and "PRN" stands for pro re nata (as needed).
Question 9: A nurse is providing teaching for a client who has a new
prescription for a drug with a high potential for toxicity. Which of the
following information should the nurse include?
A. Periodic laboratory tests are essential to measure serum drug levels.
B. Monitoring for indications of toxicity is unnecessary if the client feels
well.
C. Taking the drug with an inducing agent will increase the possibility of
toxicity.
D. Increasing fluid intake is recommended to avoid toxicity.
CORRECT ANSWER: A. Periodic laboratory tests are essential to
measure serum drug levels.
Rationale: Clients taking drugs with high toxicity potential should undergo
regular monitoring of serum drug levels to ensure the drug level stays
within the therapeutic range. Inducing agents increase metabolism and
decrease drug levels, not increase them. Increasing fluids does not reduce
toxicity risk. Monitoring is always necessary.
Question 10: A nurse is teaching a client about the adverse effects of
digoxin. Which of the following statements should the nurse include in
the teaching?
A. "Adverse effects are the intended effects of the medication."
B. "Adverse effects indicate a severe allergy to the medication."
C. "Decrease your medication dose if adverse effects occur."
D. "Contact your provider if adverse effects occur."
CORRECT ANSWER: D. "Contact your provider if adverse effects occur."
Rationale: Adverse effects can be severe and life-threatening. The client
should contact their provider if adverse effects occur. Adverse effects are
unexpected or unintended effects of a drug, not the intended effects. They
do not always indicate an allergy. Clients should never adjust their own
dosage without consulting their provider.
Question 11: A nurse is preparing to administer IV morphine sulfate 2
mg to a post-operative client who is 6 hours post-op. The client reports
pain rated 8/10. The client's respiratory rate is 9 breaths per minute.
& Answers, ATI RN Pharmacology Exam Prep, Medication
Administration, Drug Classifications, Side Effects,
Contraindications, Nursing Interventions, and Detailed Rationales
Question 1: A nurse is preparing to administer a medication to a client
who has a history of renal failure. Which pharmacokinetic process
should the nurse expect to be most affected?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
CORRECT ANSWER: D. Excretion
Rationale: The kidneys are the primary organs responsible for the excretion
of drugs and their metabolites. Impaired renal function leads to decreased
drug clearance and a high risk for toxicity. While the liver primarily handles
metabolism, renal failure directly impacts the elimination of drugs and
their active metabolites from the body.
Question 2: A nurse is preparing to administer 0.5 g of a medication.
The available dose is 250 mg tablets. How many tablets should the
nurse administer?
A. 0.5 tablet
B. 1 tablet
C. 2 tablets
D. 4 tablets
CORRECT ANSWER: C. 2 tablets
Rationale: First, convert grams to milligrams: 0.5 g = 500 mg. Then, divide
the ordered dose by the available dose: 500 mg ÷ 250 mg = 2 tablets. This
calculation ensures the client receives the prescribed amount of
medication.
Question 3: A nurse is reviewing a client's medication record and notes
a prescription for a "trough level." When should the nurse schedule the
blood draw?
A. 30 minutes after the dose is administered
B. Exactly mid-way between doses
,C. 15 minutes before the next dose
D. 2 hours after the start of the infusion
CORRECT ANSWER: C. 15 minutes before the next dose
Rationale: The trough level represents the lowest concentration of the drug
in the bloodstream. It is measured immediately (usually 15–30 minutes)
before the next scheduled dose to determine if the drug level is within the
therapeutic range and not accumulating to toxic levels.
Question 4: A nurse is preparing to administer an intramuscular (IM)
injection to an adult client who has a BMI of 32. Which needle length
should the nurse select?
A. 5/8 inch
B. 1 inch
C. 1 1/2 inches
D. 2 inches
CORRECT ANSWER: C. 1 1/2 inches
Rationale: For an obese client (BMI > 30), a longer needle (1.5 inches) is
required to ensure the medication reaches the muscle tissue rather than
staying in the subcutaneous fat layer. A 5/8-inch or 1-inch needle may only
reach subcutaneous tissue in this client, delaying absorption.
Question 5: A nurse is preparing to administer phenobarbital to a client.
Which pharmacokinetic concept explains why this drug has a long
duration of action?
A. First-pass effect
B. High lipid solubility
C. Protein binding
D. Half-life
CORRECT ANSWER: D. Half-life
Rationale: Half-life is the time it takes for the concentration of a drug in the
body to reduce by 50%. Phenobarbital has a long half-life, meaning it stays
in the system longer and requires less frequent dosing. While lipid solubility
affects distribution, the duration of action is primarily determined by the
half-life.
,Question 6: A nurse is teaching a client about the "First-pass effect."
Which route of administration is most affected by this process?
A. Intravenous
B. Sublingual
C. Oral
D. Transdermal
CORRECT ANSWER: C. Oral
Rationale: Oral medications are absorbed in the GI tract and travel to the
liver via the portal vein before reaching systemic circulation. The liver may
metabolize a large portion of the drug, reducing its bioavailability.
Intravenous, sublingual, and transdermal routes bypass the first-pass
effect.
Question 7: A nurse is calculating the IV flow rate for a client who is to
receive 1,000 mL of 0.9% Sodium Chloride over 8 hours. The drop factor
is 15 gtt/mL. What is the flow rate in gtt/min? (Round to the nearest
whole number).
A. 21 gtt/min
B. 31 gtt/min
C. 42 gtt/min
D. 63 gtt/min
CORRECT ANSWER: B. 31 gtt/min
Rationale: Total volume (1,000 mL) × Drop factor (15) ÷ Total time in
minutes (480 min) = 31.25. Rounded to the nearest whole number is 31
gtt/min. This calculation ensures the IV fluid infuses at the prescribed rate.
Question 8: A nurse is reviewing a prescription for a medication to be
given "AC." When should the nurse administer this drug?
A. After meals
B. Before meals
C. At bedtime
D. As needed
CORRECT ANSWER: B. Before meals
Rationale: The abbreviation "AC" stands for ante cibum, which means
"before meals." The nurse should administer the medication 30 minutes to
, 1 hour before meals. "PC" stands for post cibum (after meals), "HS" stands
for hora somni (at bedtime), and "PRN" stands for pro re nata (as needed).
Question 9: A nurse is providing teaching for a client who has a new
prescription for a drug with a high potential for toxicity. Which of the
following information should the nurse include?
A. Periodic laboratory tests are essential to measure serum drug levels.
B. Monitoring for indications of toxicity is unnecessary if the client feels
well.
C. Taking the drug with an inducing agent will increase the possibility of
toxicity.
D. Increasing fluid intake is recommended to avoid toxicity.
CORRECT ANSWER: A. Periodic laboratory tests are essential to
measure serum drug levels.
Rationale: Clients taking drugs with high toxicity potential should undergo
regular monitoring of serum drug levels to ensure the drug level stays
within the therapeutic range. Inducing agents increase metabolism and
decrease drug levels, not increase them. Increasing fluids does not reduce
toxicity risk. Monitoring is always necessary.
Question 10: A nurse is teaching a client about the adverse effects of
digoxin. Which of the following statements should the nurse include in
the teaching?
A. "Adverse effects are the intended effects of the medication."
B. "Adverse effects indicate a severe allergy to the medication."
C. "Decrease your medication dose if adverse effects occur."
D. "Contact your provider if adverse effects occur."
CORRECT ANSWER: D. "Contact your provider if adverse effects occur."
Rationale: Adverse effects can be severe and life-threatening. The client
should contact their provider if adverse effects occur. Adverse effects are
unexpected or unintended effects of a drug, not the intended effects. They
do not always indicate an allergy. Clients should never adjust their own
dosage without consulting their provider.
Question 11: A nurse is preparing to administer IV morphine sulfate 2
mg to a post-operative client who is 6 hours post-op. The client reports
pain rated 8/10. The client's respiratory rate is 9 breaths per minute.
