Page 1 of 66
NSG 124 PHARMACOLOGY — MIDTERM EXAM 2026/2027
COMPLETE (150) CURRENT TESTING QUESTIONS AND
CORRECT ANSWERS WITH DETAILED RATIONALES.
PHARMACOLOGY
Prepare effectively for the NSG 124 Pharmacology Midterm Exam with this focused
study resource. It supports review of pharmacology principles, medication classes,
pharmacokinetics, pharmacodynamics, therapeutic effects, adverse reactions, drug
interactions, and safe medication administration. Use the material to reinforce your
pharmacology knowledge, review high-yield topics, and identify areas that may
require additional study. This resource is suited for nursing students, NSG 124
learners, and candidates preparing for the Pharmacology midterm examination.
MULTIPLE CHOICE.
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS (Questions 1–
30)
1. What is the definition of pharmacokinetics?
A. The study of how drugs produce their effects on the body
B. The study of what the body does to a drug (absorption, distribution,
metabolism, excretion)
C. The study of drug interactions
D. The study of drug toxicity
Answer: B. The study of what the body does to a drug (absorption,
distribution, metabolism, excretion)
Rationale: Pharmacokinetics describes what the body does to the drug,
encompassing the four processes of absorption, distribution,
metabolism, and excretion (ADME). Pharmacodynamics, in contrast,
describes what the drug does to the body.
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2. A medication that is administered intravenously has what percentage of
bioavailability?
A. 50%
B. 75%
C. 100%
D. Variable
Answer: C. 100%
Rationale: Intravenous administration delivers the drug directly into the
systemic circulation, providing 100% bioavailability. Oral drugs have less
than 100% bioavailability due to incomplete absorption and first-pass
metabolism.
3. Which organ is the primary site of drug metabolism?
A. Kidney
B. Liver
C. Lungs
D. Intestines
Answer: B. Liver
Rationale: The liver is the primary site of drug metabolism, containing
enzyme systems (primarily the cytochrome P450 family) that transform
drugs into more water-soluble forms for excretion. Age-related decreases
in liver function may require dosage adjustments in older adults.
4. What is the term for the time it takes for the concentration of a drug in
the bloodstream to decrease by half?
A. Therapeutic index
B. Bioavailability
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C. Half-life
D. Onset of action
Answer: C. Half-life
Rationale: Half-life determines dosing frequency—drugs with shorter
half-lives require more frequent administration. Understanding half-life
helps nurses anticipate when therapeutic levels will be achieved and how
long effects will last.
5. A drug with a narrow therapeutic index requires:
A. Less frequent monitoring
B. Close monitoring of serum drug levels
C. Higher doses for effectiveness
D. Administration with food
Answer: B. Close monitoring of serum drug levels
Rationale: Drugs with a narrow therapeutic index (e.g., digoxin, lithium,
warfarin, phenytoin) have a small margin between therapeutic and toxic
doses. Close monitoring of serum levels is essential to maintain
therapeutic efficacy and prevent toxicity.
6. Which of the following describes a drug agonist?
A. A drug that binds to a receptor and blocks its activation
B. A drug that binds to a receptor and produces a response
C. A drug that has no effect on receptors
D. A drug that reverses the effects of another drug
Answer: B. A drug that binds to a receptor and produces a response
Rationale: An agonist binds to a receptor and activates it, producing a
biological response. An antagonist binds to a receptor but blocks
activation.
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7. A patient is prescribed a medication that undergoes extensive first-
pass metabolism. The nurse understands that:
A. The medication will have increased bioavailability
B. The medication will have decreased bioavailability due to hepatic
metabolism
C. The medication will be rapidly excreted by the kidneys
D. The medication will have no effect
Answer: B. The medication will have decreased bioavailability due to
hepatic metabolism
Rationale: First-pass metabolism occurs when orally administered drugs
are absorbed from the GI tract and transported via the portal vein to the
liver, where they are metabolized before reaching systemic circulation.
This reduces oral bioavailability.
8. What is the primary route of drug excretion from the body?
A. Hepatic metabolism
B. Renal excretion
C. Biliary excretion
D. Pulmonary excretion
Answer: B. Renal excretion
Rationale: The kidneys are the primary organs of drug excretion,
eliminating drugs and their metabolites through glomerular filtration,
tubular secretion, and tubular reabsorption. Impaired renal function can
lead to drug accumulation and toxicity.
NSG 124 PHARMACOLOGY — MIDTERM EXAM 2026/2027
COMPLETE (150) CURRENT TESTING QUESTIONS AND
CORRECT ANSWERS WITH DETAILED RATIONALES.
PHARMACOLOGY
Prepare effectively for the NSG 124 Pharmacology Midterm Exam with this focused
study resource. It supports review of pharmacology principles, medication classes,
pharmacokinetics, pharmacodynamics, therapeutic effects, adverse reactions, drug
interactions, and safe medication administration. Use the material to reinforce your
pharmacology knowledge, review high-yield topics, and identify areas that may
require additional study. This resource is suited for nursing students, NSG 124
learners, and candidates preparing for the Pharmacology midterm examination.
MULTIPLE CHOICE.
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS (Questions 1–
30)
1. What is the definition of pharmacokinetics?
A. The study of how drugs produce their effects on the body
B. The study of what the body does to a drug (absorption, distribution,
metabolism, excretion)
C. The study of drug interactions
D. The study of drug toxicity
Answer: B. The study of what the body does to a drug (absorption,
distribution, metabolism, excretion)
Rationale: Pharmacokinetics describes what the body does to the drug,
encompassing the four processes of absorption, distribution,
metabolism, and excretion (ADME). Pharmacodynamics, in contrast,
describes what the drug does to the body.
, Page 2 of 66
2. A medication that is administered intravenously has what percentage of
bioavailability?
A. 50%
B. 75%
C. 100%
D. Variable
Answer: C. 100%
Rationale: Intravenous administration delivers the drug directly into the
systemic circulation, providing 100% bioavailability. Oral drugs have less
than 100% bioavailability due to incomplete absorption and first-pass
metabolism.
3. Which organ is the primary site of drug metabolism?
A. Kidney
B. Liver
C. Lungs
D. Intestines
Answer: B. Liver
Rationale: The liver is the primary site of drug metabolism, containing
enzyme systems (primarily the cytochrome P450 family) that transform
drugs into more water-soluble forms for excretion. Age-related decreases
in liver function may require dosage adjustments in older adults.
4. What is the term for the time it takes for the concentration of a drug in
the bloodstream to decrease by half?
A. Therapeutic index
B. Bioavailability
, Page 3 of 66
C. Half-life
D. Onset of action
Answer: C. Half-life
Rationale: Half-life determines dosing frequency—drugs with shorter
half-lives require more frequent administration. Understanding half-life
helps nurses anticipate when therapeutic levels will be achieved and how
long effects will last.
5. A drug with a narrow therapeutic index requires:
A. Less frequent monitoring
B. Close monitoring of serum drug levels
C. Higher doses for effectiveness
D. Administration with food
Answer: B. Close monitoring of serum drug levels
Rationale: Drugs with a narrow therapeutic index (e.g., digoxin, lithium,
warfarin, phenytoin) have a small margin between therapeutic and toxic
doses. Close monitoring of serum levels is essential to maintain
therapeutic efficacy and prevent toxicity.
6. Which of the following describes a drug agonist?
A. A drug that binds to a receptor and blocks its activation
B. A drug that binds to a receptor and produces a response
C. A drug that has no effect on receptors
D. A drug that reverses the effects of another drug
Answer: B. A drug that binds to a receptor and produces a response
Rationale: An agonist binds to a receptor and activates it, producing a
biological response. An antagonist binds to a receptor but blocks
activation.
, Page 4 of 66
7. A patient is prescribed a medication that undergoes extensive first-
pass metabolism. The nurse understands that:
A. The medication will have increased bioavailability
B. The medication will have decreased bioavailability due to hepatic
metabolism
C. The medication will be rapidly excreted by the kidneys
D. The medication will have no effect
Answer: B. The medication will have decreased bioavailability due to
hepatic metabolism
Rationale: First-pass metabolism occurs when orally administered drugs
are absorbed from the GI tract and transported via the portal vein to the
liver, where they are metabolized before reaching systemic circulation.
This reduces oral bioavailability.
8. What is the primary route of drug excretion from the body?
A. Hepatic metabolism
B. Renal excretion
C. Biliary excretion
D. Pulmonary excretion
Answer: B. Renal excretion
Rationale: The kidneys are the primary organs of drug excretion,
eliminating drugs and their metabolites through glomerular filtration,
tubular secretion, and tubular reabsorption. Impaired renal function can
lead to drug accumulation and toxicity.
