NRG 200 PHARMACOLOGY FOR HUMAN CARING NURSING
–EXAM 300 ACTUAL QUESTIONS AND CORRECT ANSWERS
WITH RATIONALE LATEST 2026 ALREADY GRADED A+
Every question covers a distinct clinical scenario, a different medication, a
unique adverse effect, a specific pharmacokinetic or pharmacodynamic
principle, a separate drug-drug interaction, or a distinct nursing intervention.
No two questions ask about the same drug in the same context, the same side
effect for the same drug class, the same therapeutic indication, or the same
mechanism of action. Each of the 300 questions is unique in its focus, with no
duplication in drug, topic, or clinical application.
1. A nurse is reviewing a medication order that reads "Digoxin 0.25 mg PO QD."
What does "QD" indicate?
A) The medication should be given every other day
B) The medication should be given four times a day
C) The medication should be given once daily
D) The medication should be given as needed
Correct Answer: C) The medication should be given once daily
Rationale: "QD" is an abbreviation for quaque die, which is Latin for "once daily."
"BID" is twice a day, "TID" is three times a day, and "QOD" is every other day.
2. A patient is prescribed a medication that has a high first-pass effect. The nurse
understands that this means:
A) The drug is absorbed quickly from the stomach
B) A large portion of the drug is inactivated by the liver before reaching systemic
circulation
C) The drug has a rapid onset of action
D) The drug is excreted unchanged by the kidneys
Correct Answer: B) A large portion of the drug is inactivated by the liver before
reaching systemic circulation
Rationale: The first-pass effect refers to the metabolism of a drug by the liver
before it reaches systemic circulation. This often necessitates higher oral doses to
achieve a therapeutic effect.
3. Which organ is primarily responsible for drug metabolism?
A) Heart
,B) Lungs
C) Kidney
D) Liver
Correct Answer: D) Liver
Rationale: The liver is the primary site of drug metabolism. It contains enzymes
(primarily the cytochrome P450 system) that transform drugs into forms that are
more easily eliminated from the body.
4. What is the term for the time it takes for the concentration of a drug in the
bloodstream to reduce by half?
A) Half-life
B) Therapeutic index
C) Bioavailability
D) First pass effect
Correct Answer: A) Half-life
Rationale: The half-life of a drug is the time required for the serum concentration
of a drug to decrease by 50%. It determines the dosing frequency and the time it
takes to reach a steady state.
5. A medication with a narrow therapeutic index requires:
A) Less frequent dosing
B) Minimal adverse effects
C) Close monitoring of blood levels
D) Higher initial doses
Correct Answer: C) Close monitoring of blood levels
Rationale: A narrow therapeutic index means there is a small range between an
effective dose and a toxic dose. This requires close monitoring of drug blood levels
to ensure efficacy and prevent toxicity.
6. Which patient requires the most cautious dosing due to a higher risk of
medication toxicity?
A) A healthy 25-year-old
B) A pregnant client
C) An older adult with kidney disease
D) An adolescent athlete
Correct Answer: C) An older adult with kidney disease
Rationale: Impaired renal function reduces drug excretion, leading to drug
accumulation and an increased risk of toxicity. Older adults often have age-related
decline in renal function, necessitating careful dose adjustments.
,7. The nurse administers a drug that is an agonist. What is the expected effect of
this drug?
A) It blocks the receptor and prevents a response
B) It binds to the receptor and mimics the natural neurotransmitter, producing a
response
C) It has no effect on the receptor
D) It reverses the action of another drug
Correct Answer: B) It binds to the receptor and mimics the natural
neurotransmitter, producing a response
Rationale: An agonist is a drug that binds to a receptor and activates it, producing a
physiologic response that mimics the action of the endogenous ligand.
8. A drug that blocks a receptor and prevents the natural substance from binding is
known as a:
A) Agonist
B) Antagonist
C) Synergist
D) Potentiator
Correct Answer: B) Antagonist
Rationale: An antagonist binds to a receptor but does not activate it. It blocks the
receptor, preventing the natural substance or an agonist from binding and
producing a response.
9. The nurse is preparing to administer an enteric-coated tablet. Which action is
appropriate?
A) Crush the tablet for easier administration
B) Dissolve the tablet in water before giving
C) Instruct the patient to swallow the tablet whole without chewing
D) Cut the tablet in half if the patient has difficulty swallowing
Correct Answer: C) Instruct the patient to swallow the tablet whole without
chewing
Rationale: Enteric-coated tablets have a special coating that resists dissolution in
the stomach and dissolves in the intestine. Crushing, chewing, or dissolving
destroys this coating, leading to drug destruction in stomach acid or gastric
irritation.
10. A patient is receiving intravenous (IV) morphine. The nurse expects this route
to have:
A) A slower onset than the oral route
B) The same onset as subcutaneous administration
, C) A faster onset than the intramuscular route
D) A prolonged duration compared to other routes
Correct Answer: C) A faster onset than the intramuscular route
Rationale: Intravenous administration delivers the drug directly into the
bloodstream, producing an immediate and rapid onset of action, faster than
intramuscular, subcutaneous, or oral routes.
11. Which nursing action is most important prior to administering any medication?
A) Checking the patient's room number
B) Asking the patient their name and checking their identification band
C) Reviewing the patient's dietary preferences
D) Counting the patient's respiratory rate
Correct Answer: B) Asking the patient their name and checking their identification
band
Rationale: Patient identification is critical and should be verified using at least two
identifiers (e.g., name and date of birth) against the medication administration
record (MAR) to prevent medication errors.
12. A nurse is performing the rights of medication administration. Which of the
following is the seventh right that is often added to the traditional five rights?
A) Right time
B) Right route
C) Right documentation
D) Right patient education
Correct Answer: C) Right documentation
Rationale: The traditional five rights are right patient, drug, dose, route, and time.
Additional rights often include right documentation, right reason, right response,
and right to refuse.
13. A patient on warfarin has a new prescription for amiodarone. The nurse should
monitor for:
A) Decreased effect of warfarin
B) Increased risk of bleeding
C) No change in warfarin levels
D) Increased potassium levels
Correct Answer: B) Increased risk of bleeding
Rationale: Amiodarone inhibits the metabolism of warfarin, leading to increased
warfarin levels and an elevated International Normalized Ratio (INR). This
significantly increases the risk of bleeding.
–EXAM 300 ACTUAL QUESTIONS AND CORRECT ANSWERS
WITH RATIONALE LATEST 2026 ALREADY GRADED A+
Every question covers a distinct clinical scenario, a different medication, a
unique adverse effect, a specific pharmacokinetic or pharmacodynamic
principle, a separate drug-drug interaction, or a distinct nursing intervention.
No two questions ask about the same drug in the same context, the same side
effect for the same drug class, the same therapeutic indication, or the same
mechanism of action. Each of the 300 questions is unique in its focus, with no
duplication in drug, topic, or clinical application.
1. A nurse is reviewing a medication order that reads "Digoxin 0.25 mg PO QD."
What does "QD" indicate?
A) The medication should be given every other day
B) The medication should be given four times a day
C) The medication should be given once daily
D) The medication should be given as needed
Correct Answer: C) The medication should be given once daily
Rationale: "QD" is an abbreviation for quaque die, which is Latin for "once daily."
"BID" is twice a day, "TID" is three times a day, and "QOD" is every other day.
2. A patient is prescribed a medication that has a high first-pass effect. The nurse
understands that this means:
A) The drug is absorbed quickly from the stomach
B) A large portion of the drug is inactivated by the liver before reaching systemic
circulation
C) The drug has a rapid onset of action
D) The drug is excreted unchanged by the kidneys
Correct Answer: B) A large portion of the drug is inactivated by the liver before
reaching systemic circulation
Rationale: The first-pass effect refers to the metabolism of a drug by the liver
before it reaches systemic circulation. This often necessitates higher oral doses to
achieve a therapeutic effect.
3. Which organ is primarily responsible for drug metabolism?
A) Heart
,B) Lungs
C) Kidney
D) Liver
Correct Answer: D) Liver
Rationale: The liver is the primary site of drug metabolism. It contains enzymes
(primarily the cytochrome P450 system) that transform drugs into forms that are
more easily eliminated from the body.
4. What is the term for the time it takes for the concentration of a drug in the
bloodstream to reduce by half?
A) Half-life
B) Therapeutic index
C) Bioavailability
D) First pass effect
Correct Answer: A) Half-life
Rationale: The half-life of a drug is the time required for the serum concentration
of a drug to decrease by 50%. It determines the dosing frequency and the time it
takes to reach a steady state.
5. A medication with a narrow therapeutic index requires:
A) Less frequent dosing
B) Minimal adverse effects
C) Close monitoring of blood levels
D) Higher initial doses
Correct Answer: C) Close monitoring of blood levels
Rationale: A narrow therapeutic index means there is a small range between an
effective dose and a toxic dose. This requires close monitoring of drug blood levels
to ensure efficacy and prevent toxicity.
6. Which patient requires the most cautious dosing due to a higher risk of
medication toxicity?
A) A healthy 25-year-old
B) A pregnant client
C) An older adult with kidney disease
D) An adolescent athlete
Correct Answer: C) An older adult with kidney disease
Rationale: Impaired renal function reduces drug excretion, leading to drug
accumulation and an increased risk of toxicity. Older adults often have age-related
decline in renal function, necessitating careful dose adjustments.
,7. The nurse administers a drug that is an agonist. What is the expected effect of
this drug?
A) It blocks the receptor and prevents a response
B) It binds to the receptor and mimics the natural neurotransmitter, producing a
response
C) It has no effect on the receptor
D) It reverses the action of another drug
Correct Answer: B) It binds to the receptor and mimics the natural
neurotransmitter, producing a response
Rationale: An agonist is a drug that binds to a receptor and activates it, producing a
physiologic response that mimics the action of the endogenous ligand.
8. A drug that blocks a receptor and prevents the natural substance from binding is
known as a:
A) Agonist
B) Antagonist
C) Synergist
D) Potentiator
Correct Answer: B) Antagonist
Rationale: An antagonist binds to a receptor but does not activate it. It blocks the
receptor, preventing the natural substance or an agonist from binding and
producing a response.
9. The nurse is preparing to administer an enteric-coated tablet. Which action is
appropriate?
A) Crush the tablet for easier administration
B) Dissolve the tablet in water before giving
C) Instruct the patient to swallow the tablet whole without chewing
D) Cut the tablet in half if the patient has difficulty swallowing
Correct Answer: C) Instruct the patient to swallow the tablet whole without
chewing
Rationale: Enteric-coated tablets have a special coating that resists dissolution in
the stomach and dissolves in the intestine. Crushing, chewing, or dissolving
destroys this coating, leading to drug destruction in stomach acid or gastric
irritation.
10. A patient is receiving intravenous (IV) morphine. The nurse expects this route
to have:
A) A slower onset than the oral route
B) The same onset as subcutaneous administration
, C) A faster onset than the intramuscular route
D) A prolonged duration compared to other routes
Correct Answer: C) A faster onset than the intramuscular route
Rationale: Intravenous administration delivers the drug directly into the
bloodstream, producing an immediate and rapid onset of action, faster than
intramuscular, subcutaneous, or oral routes.
11. Which nursing action is most important prior to administering any medication?
A) Checking the patient's room number
B) Asking the patient their name and checking their identification band
C) Reviewing the patient's dietary preferences
D) Counting the patient's respiratory rate
Correct Answer: B) Asking the patient their name and checking their identification
band
Rationale: Patient identification is critical and should be verified using at least two
identifiers (e.g., name and date of birth) against the medication administration
record (MAR) to prevent medication errors.
12. A nurse is performing the rights of medication administration. Which of the
following is the seventh right that is often added to the traditional five rights?
A) Right time
B) Right route
C) Right documentation
D) Right patient education
Correct Answer: C) Right documentation
Rationale: The traditional five rights are right patient, drug, dose, route, and time.
Additional rights often include right documentation, right reason, right response,
and right to refuse.
13. A patient on warfarin has a new prescription for amiodarone. The nurse should
monitor for:
A) Decreased effect of warfarin
B) Increased risk of bleeding
C) No change in warfarin levels
D) Increased potassium levels
Correct Answer: B) Increased risk of bleeding
Rationale: Amiodarone inhibits the metabolism of warfarin, leading to increased
warfarin levels and an elevated International Normalized Ratio (INR). This
significantly increases the risk of bleeding.
