NUR2407 / NUR 2407 ONLY: Pharmacology
Exam 2 (Latest )
Rasmussen University | College of Nursing
75 Multiple-Choice Questions | Comprehensive Examination with Rationales
Format Multiple Choice (A-D), One Correct Answer
Questions 75 Total (7 Sections)
Cognitive Levels 25% Recall | 55% Application | 20% Analysis
Question Types 75% Scenario-Based | 20% Direct Recall | 5% Clinical Judgment
Section 1: Pharmacokinetics, Pharmacodynamics, and Drug Interactions
Absorption, Distribution, Metabolism, Excretion, Drug Interactions, Therapeutic Index
Q1: A nurse is administering an oral medication and explains to the patient that the drug must pass through the
liver before entering the systemic circulation. The patient asks why this matters. Which response by the nurse
best explains the first-pass effect?
A. The drug is absorbed directly into the bloodstream without any loss of potency
B. Oral medications are metabolized by the liver before reaching systemic circulation, reducing the amount of active drug
available [CORRECT]
C. The first-pass effect only occurs with intravenous medications
D. The drug is completely inactivated by stomach acid before reaching the liver
Correct Answer: B
Rationale: The first-pass effect refers to the metabolism of orally administered drugs by the liver before they reach systemic circulation, which
significantly reduces oral bioavailability. This is why some drugs (e.g., nitroglycerin) have very low oral bioavailability and must be given by
other routes. Option A is incorrect because the first-pass effect does reduce potency. Option C is wrong because the first-pass effect applies to
oral, not IV, medications. Option D describes gastric acid degradation, not hepatic first-pass metabolism.
Q2: A patient takes a medication that is a CYP450 enzyme inhibitor. The nurse anticipates that this drug will
affect the metabolism of other medications the patient takes. Which effect is expected?
A. The metabolism of other drugs will increase, decreasing their blood levels
B. The metabolism of other drugs will decrease, increasing their blood levels and risk of toxicity [CORRECT]
C. The metabolism of other drugs will remain unchanged
D. The drug will have no effect on CYP450 enzymes
Correct Answer: B
Rationale: CYP450 enzyme inhibitors block the activity of metabolic enzymes in the liver, causing decreased metabolism of other drugs that are
CYP450 substrates. This leads to increased blood levels of those drugs and a higher risk of toxicity. Enzyme inducers (A) increase metabolism,
decreasing drug levels. The inhibitor effect is the opposite. Options C and D are incorrect because inhibitors do alter CYP450 activity.
Q3: A patient is prescribed digoxin for heart failure. The nurse reviews the medication's therapeutic index and
understands that this drug has a narrow therapeutic index. Which statement best describes this characteristic?
A. The toxic dose is many times greater than the therapeutic dose, making overdose unlikely
B. The difference between the toxic dose and the effective dose is small, requiring close serum level monitoring
[CORRECT]
C. The drug has no risk of toxicity at any dose
D. The drug is always administered at the same dose regardless of serum levels
,Correct Answer: B
Rationale: A narrow therapeutic index means the difference between the toxic dose and the effective (therapeutic) dose is small, so close
monitoring is required. Digoxin, lithium, and warfarin are classic narrow TI drugs. A wide therapeutic index (A) means large safety margin. All
drugs have toxicity potential (C). Narrow TI drugs require individualized dosing and serum monitoring (D is wrong).
Q4: A nurse administers morphine 4 mg IV to a postoperative patient. The patient's family asks why IV was
chosen instead of oral. The nurse explains that the half-life concept determines dosing intervals. Which
definition of half-life is accurate?
A. The time required for the drug to be completely eliminated from the body
B. The time required for the drug concentration to decrease by 50% [CORRECT]
C. The time required for the drug to reach its peak effect
D. The time required for the drug to be absorbed into the bloodstream
Correct Answer: B
Rationale: Half-life is the time required for the drug concentration in the blood to decrease by 50%. It determines dosing intervals (drugs are
typically dosed every 1-2 half-lives). Complete elimination takes approximately 4-5 half-lives (A). Peak effect (C) relates to time to peak
concentration, not half-life. Absorption (D) describes the pharmacokinetic phase of drug entry into circulation.
Q5: A patient is taking both aspirin and warfarin. The nurse identifies that this combination produces a drug
interaction. Which type of drug interaction best describes this scenario?
A. Synergistic interaction producing an effect greater than the sum of individual effects
B. Additive interaction producing a combined effect equal to the sum of individual effects [CORRECT]
C. Antagonistic interaction producing opposing effects that reduce therapeutic efficacy
D. No interaction exists between these two medications
Correct Answer: B
Rationale: Aspirin (antiplatelet) and warfarin (anticoagulant) both impair blood clotting through different mechanisms, producing an additive
interaction where the combined bleeding risk equals the sum of their individual anticoagulant effects. Synergistic (A) means the effect is greater
than the sum. Antagonistic (C) means opposing effects. These drugs clearly interact (D is wrong), and the combination increases bleeding risk
significantly.
Q6: A nurse is reviewing controlled substance schedules. Which medication is classified as a Schedule II
controlled substance?
A. Diazepam (Valium)
B. Lorazepam (Ativan)
C. Morphine sulfate [CORRECT]
D. Phenobarbital
Correct Answer: C
Rationale: Schedule II controlled substances have high abuse potential with severe dependence liability; examples include morphine, oxycodone,
fentanyl, and methamphetamine. Diazepam and lorazepam (A, B) are Schedule IV (moderate abuse potential). Phenobarbital (D) varies by
formulation but is typically Schedule IV. Knowing schedules is essential for proper prescribing, storage, and documentation of controlled
substances per DEA regulations.
Q7: A patient with a history of asthma is prescribed propranolol for migraine prophylaxis. The nurse contacts
the provider because propranolol is contraindicated in this patient. Which rationale supports the nurse's
action?
A. Propranolol is a cardioselective beta-blocker and is safe for patients with asthma
B. Propranolol is a nonselective beta-blocker that blocks beta-2 receptors in the lungs, causing bronchoconstriction
[CORRECT]
C. Propranolol has no effect on respiratory function
D. Propranolol only affects beta-1 receptors in the heart
Correct Answer: B
, Rationale: Propranolol is a nonselective beta-blocker that blocks both beta-1 (cardiac) and beta-2 (pulmonary, vascular) receptors. Blocking
beta-2 receptors in the bronchial smooth muscle causes bronchoconstriction, which is dangerous for patients with asthma or COPD.
Cardioselective beta-blockers like metoprolol primarily block beta-1 receptors (A, D describe metoprolol, not propranolol). Option C is incorrect
because nonselective agents do affect respiratory function.
Q8: A patient develops an unusual and unexpected reaction to a prescribed antibiotic that is not related to the
drug's known pharmacological action. The nurse documents this as which type of reaction?
A. Allergic reaction
B. Idiosyncratic reaction [CORRECT]
C. Synergistic reaction
D. Therapeutic effect
Correct Answer: B
Rationale: An idiosyncratic reaction is an unusual, unexpected, and often genetically determined response to a drug that is not related to its known
pharmacological effects. Unlike allergic reactions (A), which are immune-mediated, idiosyncratic reactions may include unexpected effects like
hyperactivity from a sedative. Synergistic (C) describes combined drug effects. Therapeutic effect (D) is the intended response.
Q9: A nurse is caring for a patient with a CNS infection. Which characteristic of a medication would be most
important for the drug to effectively reach the brain tissue?
A. The drug must be water-soluble and highly protein-bound
B. The drug must be lipid-soluble to cross the blood-brain barrier [CORRECT]
C. The drug must have a large molecular weight to reach cerebral tissue
D. The drug must be administered only by the oral route
Correct Answer: B
Rationale: Lipid-soluble (lipophilic) drugs cross the blood-brain barrier more readily than water-soluble or highly protein-bound drugs. The BBB
is a selective barrier that limits drug entry to small, lipid-soluble, un-ionized molecules. Water solubility and high protein binding (A) hinder CNS
penetration. Large molecular weight (C) impedes barrier crossing. Route of administration (D) does not determine BBB penetration; lipid
solubility does.
Q10: A patient taking phenobarbital (a CYP450 enzyme inducer) is started on a new medication that is
metabolized by the same enzyme system. What effect should the nurse anticipate?
A. The new drug will have increased blood levels and greater therapeutic effect
B. The new drug will be metabolized more quickly, decreasing its blood levels and potentially reducing its effectiveness
[CORRECT]
C. The new drug's metabolism will be completely blocked
D. There will be no interaction between these medications
Correct Answer: B
Rationale: Enzyme inducers like phenobarbital increase the activity of CYP450 enzymes, accelerating the metabolism of other drugs processed by
the same system. This leads to decreased blood levels and potentially subtherapeutic effects, possibly requiring dosage increases. Option A
describes the effect of an enzyme inhibitor. Complete blockade (C) is an extreme mischaracterization. No interaction (D) is incorrect because
inducers do affect co-administered drugs.
Q11: The nurse is preparing to administer furosemide (Lasix) IV to a patient with heart failure. Before
administering, the nurse obtains the patient's blood pressure. Which pharmacokinetic phase is most directly
relevant to the nurse checking the BP before giving this IV medication?
A. Absorption
B. Distribution [CORRECT]
C. Metabolism
D. Excretion
Correct Answer: B
Exam 2 (Latest )
Rasmussen University | College of Nursing
75 Multiple-Choice Questions | Comprehensive Examination with Rationales
Format Multiple Choice (A-D), One Correct Answer
Questions 75 Total (7 Sections)
Cognitive Levels 25% Recall | 55% Application | 20% Analysis
Question Types 75% Scenario-Based | 20% Direct Recall | 5% Clinical Judgment
Section 1: Pharmacokinetics, Pharmacodynamics, and Drug Interactions
Absorption, Distribution, Metabolism, Excretion, Drug Interactions, Therapeutic Index
Q1: A nurse is administering an oral medication and explains to the patient that the drug must pass through the
liver before entering the systemic circulation. The patient asks why this matters. Which response by the nurse
best explains the first-pass effect?
A. The drug is absorbed directly into the bloodstream without any loss of potency
B. Oral medications are metabolized by the liver before reaching systemic circulation, reducing the amount of active drug
available [CORRECT]
C. The first-pass effect only occurs with intravenous medications
D. The drug is completely inactivated by stomach acid before reaching the liver
Correct Answer: B
Rationale: The first-pass effect refers to the metabolism of orally administered drugs by the liver before they reach systemic circulation, which
significantly reduces oral bioavailability. This is why some drugs (e.g., nitroglycerin) have very low oral bioavailability and must be given by
other routes. Option A is incorrect because the first-pass effect does reduce potency. Option C is wrong because the first-pass effect applies to
oral, not IV, medications. Option D describes gastric acid degradation, not hepatic first-pass metabolism.
Q2: A patient takes a medication that is a CYP450 enzyme inhibitor. The nurse anticipates that this drug will
affect the metabolism of other medications the patient takes. Which effect is expected?
A. The metabolism of other drugs will increase, decreasing their blood levels
B. The metabolism of other drugs will decrease, increasing their blood levels and risk of toxicity [CORRECT]
C. The metabolism of other drugs will remain unchanged
D. The drug will have no effect on CYP450 enzymes
Correct Answer: B
Rationale: CYP450 enzyme inhibitors block the activity of metabolic enzymes in the liver, causing decreased metabolism of other drugs that are
CYP450 substrates. This leads to increased blood levels of those drugs and a higher risk of toxicity. Enzyme inducers (A) increase metabolism,
decreasing drug levels. The inhibitor effect is the opposite. Options C and D are incorrect because inhibitors do alter CYP450 activity.
Q3: A patient is prescribed digoxin for heart failure. The nurse reviews the medication's therapeutic index and
understands that this drug has a narrow therapeutic index. Which statement best describes this characteristic?
A. The toxic dose is many times greater than the therapeutic dose, making overdose unlikely
B. The difference between the toxic dose and the effective dose is small, requiring close serum level monitoring
[CORRECT]
C. The drug has no risk of toxicity at any dose
D. The drug is always administered at the same dose regardless of serum levels
,Correct Answer: B
Rationale: A narrow therapeutic index means the difference between the toxic dose and the effective (therapeutic) dose is small, so close
monitoring is required. Digoxin, lithium, and warfarin are classic narrow TI drugs. A wide therapeutic index (A) means large safety margin. All
drugs have toxicity potential (C). Narrow TI drugs require individualized dosing and serum monitoring (D is wrong).
Q4: A nurse administers morphine 4 mg IV to a postoperative patient. The patient's family asks why IV was
chosen instead of oral. The nurse explains that the half-life concept determines dosing intervals. Which
definition of half-life is accurate?
A. The time required for the drug to be completely eliminated from the body
B. The time required for the drug concentration to decrease by 50% [CORRECT]
C. The time required for the drug to reach its peak effect
D. The time required for the drug to be absorbed into the bloodstream
Correct Answer: B
Rationale: Half-life is the time required for the drug concentration in the blood to decrease by 50%. It determines dosing intervals (drugs are
typically dosed every 1-2 half-lives). Complete elimination takes approximately 4-5 half-lives (A). Peak effect (C) relates to time to peak
concentration, not half-life. Absorption (D) describes the pharmacokinetic phase of drug entry into circulation.
Q5: A patient is taking both aspirin and warfarin. The nurse identifies that this combination produces a drug
interaction. Which type of drug interaction best describes this scenario?
A. Synergistic interaction producing an effect greater than the sum of individual effects
B. Additive interaction producing a combined effect equal to the sum of individual effects [CORRECT]
C. Antagonistic interaction producing opposing effects that reduce therapeutic efficacy
D. No interaction exists between these two medications
Correct Answer: B
Rationale: Aspirin (antiplatelet) and warfarin (anticoagulant) both impair blood clotting through different mechanisms, producing an additive
interaction where the combined bleeding risk equals the sum of their individual anticoagulant effects. Synergistic (A) means the effect is greater
than the sum. Antagonistic (C) means opposing effects. These drugs clearly interact (D is wrong), and the combination increases bleeding risk
significantly.
Q6: A nurse is reviewing controlled substance schedules. Which medication is classified as a Schedule II
controlled substance?
A. Diazepam (Valium)
B. Lorazepam (Ativan)
C. Morphine sulfate [CORRECT]
D. Phenobarbital
Correct Answer: C
Rationale: Schedule II controlled substances have high abuse potential with severe dependence liability; examples include morphine, oxycodone,
fentanyl, and methamphetamine. Diazepam and lorazepam (A, B) are Schedule IV (moderate abuse potential). Phenobarbital (D) varies by
formulation but is typically Schedule IV. Knowing schedules is essential for proper prescribing, storage, and documentation of controlled
substances per DEA regulations.
Q7: A patient with a history of asthma is prescribed propranolol for migraine prophylaxis. The nurse contacts
the provider because propranolol is contraindicated in this patient. Which rationale supports the nurse's
action?
A. Propranolol is a cardioselective beta-blocker and is safe for patients with asthma
B. Propranolol is a nonselective beta-blocker that blocks beta-2 receptors in the lungs, causing bronchoconstriction
[CORRECT]
C. Propranolol has no effect on respiratory function
D. Propranolol only affects beta-1 receptors in the heart
Correct Answer: B
, Rationale: Propranolol is a nonselective beta-blocker that blocks both beta-1 (cardiac) and beta-2 (pulmonary, vascular) receptors. Blocking
beta-2 receptors in the bronchial smooth muscle causes bronchoconstriction, which is dangerous for patients with asthma or COPD.
Cardioselective beta-blockers like metoprolol primarily block beta-1 receptors (A, D describe metoprolol, not propranolol). Option C is incorrect
because nonselective agents do affect respiratory function.
Q8: A patient develops an unusual and unexpected reaction to a prescribed antibiotic that is not related to the
drug's known pharmacological action. The nurse documents this as which type of reaction?
A. Allergic reaction
B. Idiosyncratic reaction [CORRECT]
C. Synergistic reaction
D. Therapeutic effect
Correct Answer: B
Rationale: An idiosyncratic reaction is an unusual, unexpected, and often genetically determined response to a drug that is not related to its known
pharmacological effects. Unlike allergic reactions (A), which are immune-mediated, idiosyncratic reactions may include unexpected effects like
hyperactivity from a sedative. Synergistic (C) describes combined drug effects. Therapeutic effect (D) is the intended response.
Q9: A nurse is caring for a patient with a CNS infection. Which characteristic of a medication would be most
important for the drug to effectively reach the brain tissue?
A. The drug must be water-soluble and highly protein-bound
B. The drug must be lipid-soluble to cross the blood-brain barrier [CORRECT]
C. The drug must have a large molecular weight to reach cerebral tissue
D. The drug must be administered only by the oral route
Correct Answer: B
Rationale: Lipid-soluble (lipophilic) drugs cross the blood-brain barrier more readily than water-soluble or highly protein-bound drugs. The BBB
is a selective barrier that limits drug entry to small, lipid-soluble, un-ionized molecules. Water solubility and high protein binding (A) hinder CNS
penetration. Large molecular weight (C) impedes barrier crossing. Route of administration (D) does not determine BBB penetration; lipid
solubility does.
Q10: A patient taking phenobarbital (a CYP450 enzyme inducer) is started on a new medication that is
metabolized by the same enzyme system. What effect should the nurse anticipate?
A. The new drug will have increased blood levels and greater therapeutic effect
B. The new drug will be metabolized more quickly, decreasing its blood levels and potentially reducing its effectiveness
[CORRECT]
C. The new drug's metabolism will be completely blocked
D. There will be no interaction between these medications
Correct Answer: B
Rationale: Enzyme inducers like phenobarbital increase the activity of CYP450 enzymes, accelerating the metabolism of other drugs processed by
the same system. This leads to decreased blood levels and potentially subtherapeutic effects, possibly requiring dosage increases. Option A
describes the effect of an enzyme inhibitor. Complete blockade (C) is an extreme mischaracterization. No interaction (D) is incorrect because
inducers do affect co-administered drugs.
Q11: The nurse is preparing to administer furosemide (Lasix) IV to a patient with heart failure. Before
administering, the nurse obtains the patient's blood pressure. Which pharmacokinetic phase is most directly
relevant to the nurse checking the BP before giving this IV medication?
A. Absorption
B. Distribution [CORRECT]
C. Metabolism
D. Excretion
Correct Answer: B
