NURS 305 Exam 1 V3 | NURS 305 Pharmacology | Actual Q&A with
Rationale (NURS305 Exam 1) | Liberty University
1. A nurse is preparing to administer an oral medication that undergoes extensive first-pass
metabolism. Which statement best describes the clinical significance of this process?
A. The medication will reach systemic circulation faster than if given IV.
B. A large portion of the drug is chemically changed in the liver before reaching systemic
circulation.
C. The medication will have a higher bioavailability compared to other routes.
D. The kidneys will excrete the drug immediately upon entering the bloodstream.
Answer: B
Explanation: The first-pass effect refers to the metabolism of a drug by the liver after
absorption from the gastrointestinal tract and before it reaches the systemic circulation.
This process significantly reduces the amount of active drug available to the target tissues.
Understanding this concept is crucial for nurses to recognize why oral dosages are often
much higher than parenteral dosages for the same medication.
2. Which pharmacokinetic process is most affected by a patient with severe chronic renal
failure?
A. Absorption
B. Excretion
C. Distribution
D. Metabolism
Answer: B
Explanation: The kidneys are the primary organs responsible for the excretion of drugs
and their metabolites from the body. In the presence of severe chronic renal failure, the
glomerular filtration rate is decreased, leading to potential drug accumulation and toxicity.
Nurses must monitor renal function labs such as BUN and Creatinine to ensure safe
medication administration in these patients.
3. A drug has a half-life of 4 hours. If a patient takes a 200 mg dose, how much of the drug will
remain in the body after 12 hours?
A. 25 mg
B. 50 mg
C. 100 mg
,D. 12.5 mg
Answer: A
Explanation: Half-life is the time required for the concentration of a drug in the body to
decrease by 50%. After 4 hours (1 half-life), 100 mg remains; after 8 hours (2 half-lives), 50
mg remains; and after 12 hours (3 half-lives), 25 mg remains. Calculating drug clearance is
vital for determining dosing intervals and preventing toxicity.
4. Which of the following describes an ‘agonist’ medication?
A. A drug that blocks a receptor to prevent a physiological response.
B. A drug that causes an adverse reaction unrelated to the receptor site.
C. A drug that binds to a receptor and stimulates a physiological response.
D. A drug that speeds up the excretion of other medications.
Answer: C
Explanation: An agonist is a molecule that mimics the action of a naturally occurring
substance by binding to and activating a receptor. This results in a specific biochemical or
physiological response within the cell. Antagonists, conversely, bind to receptors to inhibit
or block the response of natural substances or other drugs.
5. The nurse is reviewing the rights of medication administration. Which of the following is
NOT traditionally included in the basic ‘Five Rights’?
A. Right Patient
B. Right Documentation
C. Right Time
D. Right Cost
Answer: D
Explanation: The traditional ‘Five Rights’ include Right Patient, Right Drug, Right Dose,
Right Route, and Right Time, with Right Documentation often added as a sixth. Right Cost is
not a clinical safety requirement for the administration process itself, although cost-
effectiveness is a broader healthcare goal. Nurses must verify these rights at least three
times before administration to prevent medication errors.
6. A patient is prescribed a medication that is classified as a Pregnancy Category X drug. What
does this classification imply?
A. The drug is contraindicated in pregnant women because of proven fetal abnormalities.
B. Animal studies show risk, but human studies do not.
C. The drug is safe if the benefits outweigh the minor risks.
, D. Studies have shown no risk to the human fetus.
Answer: A
Explanation: Pregnancy Category X indicates that studies in animals or humans have
demonstrated fetal abnormalities or there is evidence of fetal risk based on human
experience. The risks involved in the use of the drug in pregnant women clearly outweigh
any potential benefits. It is a critical nursing responsibility to screen for pregnancy before
administering medications in this category.
7. Which scheduling of controlled substances has the highest potential for abuse while still
having accepted medical uses?
A. Schedule II
B. Schedule I
C. Schedule III
D. Schedule V
Answer: A
Explanation: Schedule II drugs have a high potential for abuse which may lead to severe
psychological or physical dependence, but they have currently accepted medical uses in
treatment. Examples include morphine, oxycodone, and amphetamines. Schedule I drugs
have high abuse potential but no accepted medical use in the United States.
8. A patient requires an increasing dose of an opioid to achieve the same pain relief
previously felt with a lower dose. The nurse recognizes this as:
A. Tolerance
B. Addiction
C. Physical dependence
D. Abstinence syndrome
Answer: A
Explanation: Tolerance is a common physiological result of chronic opioid treatment
where a larger dose is required to maintain the same level of analgesia. It is distinct from
addiction, which is characterized by compulsive drug-seeking behavior despite harm.
Nurses must assess for tolerance to ensure patients receive adequate pain management.
9. Which nursing action is the priority when a patient experiences an anaphylactic reaction to
a medication?
A. Administering a dose of diphenhydramine (Benadryl).
B. Notifying the healthcare provider of the reaction.
Rationale (NURS305 Exam 1) | Liberty University
1. A nurse is preparing to administer an oral medication that undergoes extensive first-pass
metabolism. Which statement best describes the clinical significance of this process?
A. The medication will reach systemic circulation faster than if given IV.
B. A large portion of the drug is chemically changed in the liver before reaching systemic
circulation.
C. The medication will have a higher bioavailability compared to other routes.
D. The kidneys will excrete the drug immediately upon entering the bloodstream.
Answer: B
Explanation: The first-pass effect refers to the metabolism of a drug by the liver after
absorption from the gastrointestinal tract and before it reaches the systemic circulation.
This process significantly reduces the amount of active drug available to the target tissues.
Understanding this concept is crucial for nurses to recognize why oral dosages are often
much higher than parenteral dosages for the same medication.
2. Which pharmacokinetic process is most affected by a patient with severe chronic renal
failure?
A. Absorption
B. Excretion
C. Distribution
D. Metabolism
Answer: B
Explanation: The kidneys are the primary organs responsible for the excretion of drugs
and their metabolites from the body. In the presence of severe chronic renal failure, the
glomerular filtration rate is decreased, leading to potential drug accumulation and toxicity.
Nurses must monitor renal function labs such as BUN and Creatinine to ensure safe
medication administration in these patients.
3. A drug has a half-life of 4 hours. If a patient takes a 200 mg dose, how much of the drug will
remain in the body after 12 hours?
A. 25 mg
B. 50 mg
C. 100 mg
,D. 12.5 mg
Answer: A
Explanation: Half-life is the time required for the concentration of a drug in the body to
decrease by 50%. After 4 hours (1 half-life), 100 mg remains; after 8 hours (2 half-lives), 50
mg remains; and after 12 hours (3 half-lives), 25 mg remains. Calculating drug clearance is
vital for determining dosing intervals and preventing toxicity.
4. Which of the following describes an ‘agonist’ medication?
A. A drug that blocks a receptor to prevent a physiological response.
B. A drug that causes an adverse reaction unrelated to the receptor site.
C. A drug that binds to a receptor and stimulates a physiological response.
D. A drug that speeds up the excretion of other medications.
Answer: C
Explanation: An agonist is a molecule that mimics the action of a naturally occurring
substance by binding to and activating a receptor. This results in a specific biochemical or
physiological response within the cell. Antagonists, conversely, bind to receptors to inhibit
or block the response of natural substances or other drugs.
5. The nurse is reviewing the rights of medication administration. Which of the following is
NOT traditionally included in the basic ‘Five Rights’?
A. Right Patient
B. Right Documentation
C. Right Time
D. Right Cost
Answer: D
Explanation: The traditional ‘Five Rights’ include Right Patient, Right Drug, Right Dose,
Right Route, and Right Time, with Right Documentation often added as a sixth. Right Cost is
not a clinical safety requirement for the administration process itself, although cost-
effectiveness is a broader healthcare goal. Nurses must verify these rights at least three
times before administration to prevent medication errors.
6. A patient is prescribed a medication that is classified as a Pregnancy Category X drug. What
does this classification imply?
A. The drug is contraindicated in pregnant women because of proven fetal abnormalities.
B. Animal studies show risk, but human studies do not.
C. The drug is safe if the benefits outweigh the minor risks.
, D. Studies have shown no risk to the human fetus.
Answer: A
Explanation: Pregnancy Category X indicates that studies in animals or humans have
demonstrated fetal abnormalities or there is evidence of fetal risk based on human
experience. The risks involved in the use of the drug in pregnant women clearly outweigh
any potential benefits. It is a critical nursing responsibility to screen for pregnancy before
administering medications in this category.
7. Which scheduling of controlled substances has the highest potential for abuse while still
having accepted medical uses?
A. Schedule II
B. Schedule I
C. Schedule III
D. Schedule V
Answer: A
Explanation: Schedule II drugs have a high potential for abuse which may lead to severe
psychological or physical dependence, but they have currently accepted medical uses in
treatment. Examples include morphine, oxycodone, and amphetamines. Schedule I drugs
have high abuse potential but no accepted medical use in the United States.
8. A patient requires an increasing dose of an opioid to achieve the same pain relief
previously felt with a lower dose. The nurse recognizes this as:
A. Tolerance
B. Addiction
C. Physical dependence
D. Abstinence syndrome
Answer: A
Explanation: Tolerance is a common physiological result of chronic opioid treatment
where a larger dose is required to maintain the same level of analgesia. It is distinct from
addiction, which is characterized by compulsive drug-seeking behavior despite harm.
Nurses must assess for tolerance to ensure patients receive adequate pain management.
9. Which nursing action is the priority when a patient experiences an anaphylactic reaction to
a medication?
A. Administering a dose of diphenhydramine (Benadryl).
B. Notifying the healthcare provider of the reaction.
