ATI PN Pharmacology Proctored Exam 2026 – 350
Latest Questions & Verified Answers with Detailed
Rationales | NGN Practice Test Bank & LPN Study
Guide | Instant Download
Section 1: Pharmacokinetics & Pharmacodynamics (Questions 1–30)
1. A nurse is preparing to administer a drug with a narrow therapeutic index. Which action is
most important?
(A) Administer with food
(B) Monitor serum drug levels
(C) Give the drug IV push
(D) Teach the client about side effects
Answer: B. Narrow therapeutic index drugs (e.g., digoxin, warfarin, lithium) have a small
margin between therapeutic and toxic doses. Serum level monitoring is essential to prevent
toxicity.
2. A client asks why a medication is prescribed "every 6 hours" instead of "once daily." The
nurse explains it is related to which concept?
(A) Half-life
(B) Bioavailability
,(C) First-pass effect
(D) Protein binding
Answer: A. Half-life determines how long a drug remains active. Drugs with short half-lives
require more frequent dosing to maintain therapeutic levels.
3. Which client is at greatest risk for drug toxicity due to impaired excretion?
(A) Client with cirrhosis
(B) Client with renal failure
(C) Client with asthma
(D) Client with GERD
Answer: B. The kidneys are the primary route of drug excretion. Renal failure causes drugs
to accumulate, increasing toxicity risk.
4. A nurse is calculating a pediatric dose. Which factor is most important?
(A) Child's age in months
(B) Child's weight in kilograms
(C) Child's height
(D) Parent's preference
Answer: B. Pediatric doses are most accurately calculated based on the child's weight in
kilograms to ensure safe and therapeutic dosing.
5. A client who takes warfarin, a highly protein-bound anticoagulant, is newly prescribed a
second medication that is also highly protein bound. Which nursing intervention is the
priority?
(A) Monitor the client closely for bleeding such as bruising, gum bleeding, and dark tarry
stools
(B) Teach the client that the anticoagulant effect of warfarin will be decreased
,(C) Explain that protein-bound drugs never interact with one another
(D) Encourage additional protein intake to bind both medications completely
Answer: A. Two highly protein-bound drugs compete for binding sites, displacing warfarin
and raising the level of free, active drug, which increases the risk of bleeding.
6. A client begins an oral antibiotic that has a half-life of 8 hours and will take it every 8
hours. The nurse should instruct the client that steady-state serum concentration of the drug
will generally be reached in approximately how long?
(A) 16 hours
(B) 32 to 40 hours
(C) 24 hours
(D) 72 hours
Answer: B. Steady state is reached after about 4 to 5 half-lives of consistent dosing. A drug
with an 8-hour half-life reaches steady state in roughly 32 to 40 hours.
7. A client who has been taking oral nitroglycerin for stable angina asks the nurse why the
sublingual form works faster. Which explanation by the nurse is accurate?
(A) Sublingual medication passes through the liver twice before reaching the heart
(B) Saliva activates the drug and increases its absorption in the stomach
(C) Sublingual absorption bypasses hepatic first-pass metabolism, so more drug reaches
the systemic circulation
(D) Oral nitroglycerin is destroyed by gastric acid and produces no therapeutic effect
Answer: C. Sublingual nitroglycerin is absorbed directly through the rich capillary network
of the oral mucosa into the systemic circulation, bypassing the portal vein and hepatic first-
pass inactivation.
, 8. A nurse is preparing to administer a medication. The student nurse asks what
"pharmacokinetics" means. What is the correct response?
(A) The study of what a drug does to the body
(B) The study of how the body processes a drug
(C) The study of drug toxicity and overdose management
(D) The study of genetic factors influencing drug response
Answer: B. Pharmacokinetics describes the movement of a drug through the body,
specifically the processes of Absorption, Distribution, Metabolism, and Excretion (ADME).
9. A patient is receiving a drug with a half-life of 12 hours. Approximately how long will it
take for the drug to be considered eliminated from the body?
(A) 12 hours
(B) 24 hours
(C) 60 hours
(D) 120 hours
Answer: C. It takes approximately 5 half-lives for a drug to be eliminated from the body.
With a half-life of 12 hours, elimination occurs in approximately 60 hours.
10. A nurse is preparing to administer an intramuscular (IM) injection to a 6-month-old
infant. Which site is preferred?
(A) Deltoid
(B) Ventrogluteal
(C) Vastus lateralis
(D) Dorsogluteal
Answer: C. The vastus lateralis (thigh) is the preferred IM site for infants because it is a
large, well-developed muscle with no major nerves or blood vessels.
Latest Questions & Verified Answers with Detailed
Rationales | NGN Practice Test Bank & LPN Study
Guide | Instant Download
Section 1: Pharmacokinetics & Pharmacodynamics (Questions 1–30)
1. A nurse is preparing to administer a drug with a narrow therapeutic index. Which action is
most important?
(A) Administer with food
(B) Monitor serum drug levels
(C) Give the drug IV push
(D) Teach the client about side effects
Answer: B. Narrow therapeutic index drugs (e.g., digoxin, warfarin, lithium) have a small
margin between therapeutic and toxic doses. Serum level monitoring is essential to prevent
toxicity.
2. A client asks why a medication is prescribed "every 6 hours" instead of "once daily." The
nurse explains it is related to which concept?
(A) Half-life
(B) Bioavailability
,(C) First-pass effect
(D) Protein binding
Answer: A. Half-life determines how long a drug remains active. Drugs with short half-lives
require more frequent dosing to maintain therapeutic levels.
3. Which client is at greatest risk for drug toxicity due to impaired excretion?
(A) Client with cirrhosis
(B) Client with renal failure
(C) Client with asthma
(D) Client with GERD
Answer: B. The kidneys are the primary route of drug excretion. Renal failure causes drugs
to accumulate, increasing toxicity risk.
4. A nurse is calculating a pediatric dose. Which factor is most important?
(A) Child's age in months
(B) Child's weight in kilograms
(C) Child's height
(D) Parent's preference
Answer: B. Pediatric doses are most accurately calculated based on the child's weight in
kilograms to ensure safe and therapeutic dosing.
5. A client who takes warfarin, a highly protein-bound anticoagulant, is newly prescribed a
second medication that is also highly protein bound. Which nursing intervention is the
priority?
(A) Monitor the client closely for bleeding such as bruising, gum bleeding, and dark tarry
stools
(B) Teach the client that the anticoagulant effect of warfarin will be decreased
,(C) Explain that protein-bound drugs never interact with one another
(D) Encourage additional protein intake to bind both medications completely
Answer: A. Two highly protein-bound drugs compete for binding sites, displacing warfarin
and raising the level of free, active drug, which increases the risk of bleeding.
6. A client begins an oral antibiotic that has a half-life of 8 hours and will take it every 8
hours. The nurse should instruct the client that steady-state serum concentration of the drug
will generally be reached in approximately how long?
(A) 16 hours
(B) 32 to 40 hours
(C) 24 hours
(D) 72 hours
Answer: B. Steady state is reached after about 4 to 5 half-lives of consistent dosing. A drug
with an 8-hour half-life reaches steady state in roughly 32 to 40 hours.
7. A client who has been taking oral nitroglycerin for stable angina asks the nurse why the
sublingual form works faster. Which explanation by the nurse is accurate?
(A) Sublingual medication passes through the liver twice before reaching the heart
(B) Saliva activates the drug and increases its absorption in the stomach
(C) Sublingual absorption bypasses hepatic first-pass metabolism, so more drug reaches
the systemic circulation
(D) Oral nitroglycerin is destroyed by gastric acid and produces no therapeutic effect
Answer: C. Sublingual nitroglycerin is absorbed directly through the rich capillary network
of the oral mucosa into the systemic circulation, bypassing the portal vein and hepatic first-
pass inactivation.
, 8. A nurse is preparing to administer a medication. The student nurse asks what
"pharmacokinetics" means. What is the correct response?
(A) The study of what a drug does to the body
(B) The study of how the body processes a drug
(C) The study of drug toxicity and overdose management
(D) The study of genetic factors influencing drug response
Answer: B. Pharmacokinetics describes the movement of a drug through the body,
specifically the processes of Absorption, Distribution, Metabolism, and Excretion (ADME).
9. A patient is receiving a drug with a half-life of 12 hours. Approximately how long will it
take for the drug to be considered eliminated from the body?
(A) 12 hours
(B) 24 hours
(C) 60 hours
(D) 120 hours
Answer: C. It takes approximately 5 half-lives for a drug to be eliminated from the body.
With a half-life of 12 hours, elimination occurs in approximately 60 hours.
10. A nurse is preparing to administer an intramuscular (IM) injection to a 6-month-old
infant. Which site is preferred?
(A) Deltoid
(B) Ventrogluteal
(C) Vastus lateralis
(D) Dorsogluteal
Answer: C. The vastus lateralis (thigh) is the preferred IM site for infants because it is a
large, well-developed muscle with no major nerves or blood vessels.
