NUR 210: PRINCIPLE OF PHARMACOLOGY
LATEST UPDATED 2025 VERIFIED
QUESTIONS ,ANSWERS AND RATIONALE
SUCCESS GUARANTEED GRADED A+
Question 1:
What is the primary difference between pharmacokinetics and pharmacodynamics?
Answer:
Pharmacokinetics refers to the movement of drugs through the body, including
absorption, distribution, metabolism, and excretion (what the body does to the drug).
Pharmacodynamics refers to the biological and physiological effects of drugs on the
body and their mechanisms of action (what the drug does to the body).
Rationale:
Pharmacokinetics focuses on how the drug travels and is processed, while pharmacodynamics
explains how the drug interacts with receptors and produces its effects.
Question 2:
Which organ is primarily responsible for drug metabolism?
a) Kidneys
b) Liver
c) Lungs
d) Heart
Answer:
b) Liver
Rationale:
The liver is the primary site for drug metabolism, where enzymes like cytochrome P450 break
down drugs into metabolites for easier excretion. While other organs, like the kidneys and lungs,
play roles in excretion and elimination, metabolism occurs primarily in the liver.
Question 3:
,A patient is prescribed a medication with a narrow therapeutic index. What does this
mean, and what should the nurse monitor?
Answer:
A narrow therapeutic index means the difference between the therapeutic dose and the toxic dose
is small. The nurse should monitor the patient closely for signs of toxicity and ensure therapeutic
drug levels are maintained through lab tests (e.g., serum drug levels).
Rationale:
Medications with a narrow therapeutic index, such as digoxin or warfarin, require careful dosing
and monitoring to avoid underdosing (ineffectiveness) or overdosing (toxicity).
Question 4:
Why are older adults at increased risk of adverse drug reactions?
a) Increased drug metabolism
b) Decreased renal and hepatic function
c) Enhanced immune system
d) Increased drug absorption
Answer:
b) Decreased renal and hepatic function
Rationale:
In older adults, renal and hepatic functions decline, leading to slower drug metabolism and
excretion. This can cause drugs to accumulate in the body, increasing the risk of adverse effects.
Question 5:
What is the "first-pass effect," and how does it impact drug administration?
Answer:
The "first-pass effect" occurs when oral drugs are metabolized in the liver before reaching
systemic circulation, reducing their bioavailability. To avoid this, certain drugs may be given via
non-oral routes (e.g., IV, sublingual) to bypass the liver.
Rationale:
The liver's metabolism can inactivate a portion of the drug before it becomes effective.
Understanding the first-pass effect helps guide the choice of route and dosage.
,Question 6:
What is the priority nursing action for a patient experiencing an anaphylactic reaction to a
drug?
a) Administer oxygen
b) Administer epinephrine
c) Elevate the patient’s legs
d) Notify the healthcare provider
Answer:
b) Administer epinephrine
Rationale:
Anaphylaxis is a life-threatening allergic reaction. Administering epinephrine immediately helps
reverse symptoms by relaxing airway muscles and constricting blood vessels, restoring breathing
and circulation.
Question 7:
What is the primary role of the nurse during medication administration?
a) Prescribe the medication
b) Ensure the patient has read the drug leaflet
c) Assess for patient understanding, monitor for adverse effects, and document administration
d) Adjust the medication dose as needed
Answer:
c) Assess for patient understanding, monitor for adverse effects, and document
administration
Rationale:
The nurse’s role includes ensuring the correct medication is administered safely, assessing the
patient for effectiveness and adverse reactions, and maintaining accurate records.
Question 8:
What is the purpose of enteric-coated tablets?
a) To speed up drug absorption
b) To improve the drug’s taste
c) To prevent drug breakdown in the stomach
d) To prevent overdosing
, Answer:
c) To prevent drug breakdown in the stomach
Rationale:
Enteric-coated tablets are designed to bypass the acidic environment of the stomach and dissolve
in the more alkaline intestines. This protects the stomach lining from irritation and ensures the
drug reaches the intended site of absorption.
Question 9:
Which type of drug interaction occurs when two drugs with similar actions are combined,
resulting in an amplified effect?
a) Antagonistic
b) Additive
c) Synergistic
d) Idiosyncratic
Answer:
b) Additive
Rationale:
An additive interaction occurs when the combined effect of two drugs is equal to the sum of their
individual effects. For example, combining two pain relievers like acetaminophen and ibuprofen
can enhance pain relief.
Question 10:
What lab value should be monitored when a patient is on warfarin (Coumadin)?
a) Potassium (K+)
b) Platelet count
c) International Normalized Ratio (INR)
d) Serum creatinine
Answer:
c) International Normalized Ratio (INR)
Rationale:
The INR measures how long it takes for blood to clot and is used to monitor the effectiveness
and safety of warfarin therapy. Therapeutic INR levels typically range from 2.0 to 3.0 in most
cases.
LATEST UPDATED 2025 VERIFIED
QUESTIONS ,ANSWERS AND RATIONALE
SUCCESS GUARANTEED GRADED A+
Question 1:
What is the primary difference between pharmacokinetics and pharmacodynamics?
Answer:
Pharmacokinetics refers to the movement of drugs through the body, including
absorption, distribution, metabolism, and excretion (what the body does to the drug).
Pharmacodynamics refers to the biological and physiological effects of drugs on the
body and their mechanisms of action (what the drug does to the body).
Rationale:
Pharmacokinetics focuses on how the drug travels and is processed, while pharmacodynamics
explains how the drug interacts with receptors and produces its effects.
Question 2:
Which organ is primarily responsible for drug metabolism?
a) Kidneys
b) Liver
c) Lungs
d) Heart
Answer:
b) Liver
Rationale:
The liver is the primary site for drug metabolism, where enzymes like cytochrome P450 break
down drugs into metabolites for easier excretion. While other organs, like the kidneys and lungs,
play roles in excretion and elimination, metabolism occurs primarily in the liver.
Question 3:
,A patient is prescribed a medication with a narrow therapeutic index. What does this
mean, and what should the nurse monitor?
Answer:
A narrow therapeutic index means the difference between the therapeutic dose and the toxic dose
is small. The nurse should monitor the patient closely for signs of toxicity and ensure therapeutic
drug levels are maintained through lab tests (e.g., serum drug levels).
Rationale:
Medications with a narrow therapeutic index, such as digoxin or warfarin, require careful dosing
and monitoring to avoid underdosing (ineffectiveness) or overdosing (toxicity).
Question 4:
Why are older adults at increased risk of adverse drug reactions?
a) Increased drug metabolism
b) Decreased renal and hepatic function
c) Enhanced immune system
d) Increased drug absorption
Answer:
b) Decreased renal and hepatic function
Rationale:
In older adults, renal and hepatic functions decline, leading to slower drug metabolism and
excretion. This can cause drugs to accumulate in the body, increasing the risk of adverse effects.
Question 5:
What is the "first-pass effect," and how does it impact drug administration?
Answer:
The "first-pass effect" occurs when oral drugs are metabolized in the liver before reaching
systemic circulation, reducing their bioavailability. To avoid this, certain drugs may be given via
non-oral routes (e.g., IV, sublingual) to bypass the liver.
Rationale:
The liver's metabolism can inactivate a portion of the drug before it becomes effective.
Understanding the first-pass effect helps guide the choice of route and dosage.
,Question 6:
What is the priority nursing action for a patient experiencing an anaphylactic reaction to a
drug?
a) Administer oxygen
b) Administer epinephrine
c) Elevate the patient’s legs
d) Notify the healthcare provider
Answer:
b) Administer epinephrine
Rationale:
Anaphylaxis is a life-threatening allergic reaction. Administering epinephrine immediately helps
reverse symptoms by relaxing airway muscles and constricting blood vessels, restoring breathing
and circulation.
Question 7:
What is the primary role of the nurse during medication administration?
a) Prescribe the medication
b) Ensure the patient has read the drug leaflet
c) Assess for patient understanding, monitor for adverse effects, and document administration
d) Adjust the medication dose as needed
Answer:
c) Assess for patient understanding, monitor for adverse effects, and document
administration
Rationale:
The nurse’s role includes ensuring the correct medication is administered safely, assessing the
patient for effectiveness and adverse reactions, and maintaining accurate records.
Question 8:
What is the purpose of enteric-coated tablets?
a) To speed up drug absorption
b) To improve the drug’s taste
c) To prevent drug breakdown in the stomach
d) To prevent overdosing
, Answer:
c) To prevent drug breakdown in the stomach
Rationale:
Enteric-coated tablets are designed to bypass the acidic environment of the stomach and dissolve
in the more alkaline intestines. This protects the stomach lining from irritation and ensures the
drug reaches the intended site of absorption.
Question 9:
Which type of drug interaction occurs when two drugs with similar actions are combined,
resulting in an amplified effect?
a) Antagonistic
b) Additive
c) Synergistic
d) Idiosyncratic
Answer:
b) Additive
Rationale:
An additive interaction occurs when the combined effect of two drugs is equal to the sum of their
individual effects. For example, combining two pain relievers like acetaminophen and ibuprofen
can enhance pain relief.
Question 10:
What lab value should be monitored when a patient is on warfarin (Coumadin)?
a) Potassium (K+)
b) Platelet count
c) International Normalized Ratio (INR)
d) Serum creatinine
Answer:
c) International Normalized Ratio (INR)
Rationale:
The INR measures how long it takes for blood to clot and is used to monitor the effectiveness
and safety of warfarin therapy. Therapeutic INR levels typically range from 2.0 to 3.0 in most
cases.
