NRG 200 Midterm: Complete Pharmacology
Study Guide with 700+ Q&A, Clinical Rationales,
and Medication Safety Tips for Nursing Students
1. A nurse is preparing to administer a medication to an older adult. Which
physiological change associated with aging has the most significant impact on
drug metabolism?
A) Increased gastric motility
B) Decreased liver function
C) Increased muscle mass
D) Decreased body fat
Correct Answer: B) Decreased liver function
Rationale: The liver is the primary site of drug metabolism (biotransformation). With
aging, liver mass and blood flow decrease, which can slow drug metabolism and lead to
higher drug levels and an increased risk of toxicity, often requiring lower dosages .
2. What does the term "half-life" (t½) of a drug indicate?
A) The time it takes for the drug to reach its peak therapeutic effect.
B) The time it takes for half of the drug to be eliminated from the body.
C) The total time the drug remains active in the body.
D) The time required for the drug to be completely absorbed.
Correct Answer: B) The time it takes for half of the drug to be eliminated from the
body.
, Rationale: Half-life is a crucial pharmacokinetic concept. It determines the duration of a
drug's action and helps establish appropriate dosing intervals to maintain therapeutic
levels without causing toxicity .
3. Which medication route bypasses the first-pass effect of the liver?
A) Oral
B) Sublingual
C) Rectal
D) Intramuscular
Correct Answer: B) Sublingual
Rationale: The first-pass effect is the metabolism of a drug by the liver before it reaches
systemic circulation. Drugs administered sublingually (under the tongue) are absorbed
directly into the bloodstream, bypassing the portal circulation and the liver's initial
metabolism .
Common Drug Classes & Specific Agents
4. What is the primary mechanism of action of acetaminophen?
A) Inhibiting COX-1 and COX-2 enzymes peripherally
B) Blocking sodium channels in neurons
C) Inhibiting prostaglandin synthesis in the central nervous system (CNS)
D) Stimulating opioid receptors in the brain
Correct Answer: C) Inhibiting prostaglandin synthesis in the central nervous
system (CNS).
Rationale: Unlike NSAIDs, acetaminophen has minimal anti-inflammatory effects. Its
analgesic and antipyretic actions are primarily due to the inhibition of prostaglandin
synthesis within the CNS .
, 5. A patient is prescribed warfarin. What is a key priority for patient education?
A) Avoid foods high in vitamin K.
B) Monitor for signs of bleeding, such as bruising or dark, tarry stools.
C) Take the medication with a full glass of milk.
D) Increase intake of leafy green vegetables.
Correct Answer: B) Monitor for signs of bleeding, such as bruising or dark, tarry
stools.
Rationale: Warfarin is an anticoagulant that increases the risk of bleeding. Patients must
be educated to monitor for and report signs of bleeding. While avoiding drastic changes
in vitamin K intake is important, the most critical safety education is recognizing and
reporting bleeding .
6. A patient is receiving IV heparin. Which laboratory value is most important to
monitor to ensure the medication is therapeutic and safe?
A) International Normalized Ratio (INR)
B) Prothrombin Time (PT)
C) Activated Partial Thromboplastin Time (aPTT)
D) Platelet count
Correct Answer: C) Activated Partial Thromboplastin Time (aPTT).
Rationale: aPTT is the standard laboratory test used to monitor the therapeutic effect of
unfractionated heparin. The goal is to maintain the aPTT at 1.5 to 2.5 times the normal
control value .
7. Which medication is the specific antidote for an opioid overdose?
A) Acetylcysteine
B) Flumazenil
C) Protamine sulfate
D) Naloxone
, Correct Answer: D) Naloxone
Rationale: Naloxone is a pure opioid antagonist that rapidly reverses life-threatening
respiratory depression caused by opioid overdose by competitively binding to opioid
receptors .
8. A patient is started on metformin for type 2 diabetes. What common side effect
should the nurse include in patient teaching?
A) Weight gain
B) Persistent dry cough
C) Gastrointestinal (GI) upset, such as nausea and diarrhea
D) Hyperglycemia
Correct Answer: C) Gastrointestinal (GI) upset, such as nausea and diarrhea.
Rationale: GI disturbances are the most common adverse effects associated with
metformin. These can often be minimized by taking the medication with food and
starting with a low dose that is gradually increased .
9. A patient is prescribed albuterol for asthma. What is the primary mechanism of
action of this drug?
A) Inhibiting the release of histamine.
B) Blocking muscarinic receptors in the lungs.
C) Stimulating beta-2 adrenergic receptors.
D) Reducing inflammation in the airway.
Correct Answer: C) Stimulating beta-2 adrenergic receptors.
Rationale: Albuterol is a short-acting beta-2 agonist (SABA). It works by stimulating
beta-2 receptors in the bronchial smooth muscle, leading to relaxation and
bronchodilation, which is critical for relieving acute asthma symptoms .
Study Guide with 700+ Q&A, Clinical Rationales,
and Medication Safety Tips for Nursing Students
1. A nurse is preparing to administer a medication to an older adult. Which
physiological change associated with aging has the most significant impact on
drug metabolism?
A) Increased gastric motility
B) Decreased liver function
C) Increased muscle mass
D) Decreased body fat
Correct Answer: B) Decreased liver function
Rationale: The liver is the primary site of drug metabolism (biotransformation). With
aging, liver mass and blood flow decrease, which can slow drug metabolism and lead to
higher drug levels and an increased risk of toxicity, often requiring lower dosages .
2. What does the term "half-life" (t½) of a drug indicate?
A) The time it takes for the drug to reach its peak therapeutic effect.
B) The time it takes for half of the drug to be eliminated from the body.
C) The total time the drug remains active in the body.
D) The time required for the drug to be completely absorbed.
Correct Answer: B) The time it takes for half of the drug to be eliminated from the
body.
, Rationale: Half-life is a crucial pharmacokinetic concept. It determines the duration of a
drug's action and helps establish appropriate dosing intervals to maintain therapeutic
levels without causing toxicity .
3. Which medication route bypasses the first-pass effect of the liver?
A) Oral
B) Sublingual
C) Rectal
D) Intramuscular
Correct Answer: B) Sublingual
Rationale: The first-pass effect is the metabolism of a drug by the liver before it reaches
systemic circulation. Drugs administered sublingually (under the tongue) are absorbed
directly into the bloodstream, bypassing the portal circulation and the liver's initial
metabolism .
Common Drug Classes & Specific Agents
4. What is the primary mechanism of action of acetaminophen?
A) Inhibiting COX-1 and COX-2 enzymes peripherally
B) Blocking sodium channels in neurons
C) Inhibiting prostaglandin synthesis in the central nervous system (CNS)
D) Stimulating opioid receptors in the brain
Correct Answer: C) Inhibiting prostaglandin synthesis in the central nervous
system (CNS).
Rationale: Unlike NSAIDs, acetaminophen has minimal anti-inflammatory effects. Its
analgesic and antipyretic actions are primarily due to the inhibition of prostaglandin
synthesis within the CNS .
, 5. A patient is prescribed warfarin. What is a key priority for patient education?
A) Avoid foods high in vitamin K.
B) Monitor for signs of bleeding, such as bruising or dark, tarry stools.
C) Take the medication with a full glass of milk.
D) Increase intake of leafy green vegetables.
Correct Answer: B) Monitor for signs of bleeding, such as bruising or dark, tarry
stools.
Rationale: Warfarin is an anticoagulant that increases the risk of bleeding. Patients must
be educated to monitor for and report signs of bleeding. While avoiding drastic changes
in vitamin K intake is important, the most critical safety education is recognizing and
reporting bleeding .
6. A patient is receiving IV heparin. Which laboratory value is most important to
monitor to ensure the medication is therapeutic and safe?
A) International Normalized Ratio (INR)
B) Prothrombin Time (PT)
C) Activated Partial Thromboplastin Time (aPTT)
D) Platelet count
Correct Answer: C) Activated Partial Thromboplastin Time (aPTT).
Rationale: aPTT is the standard laboratory test used to monitor the therapeutic effect of
unfractionated heparin. The goal is to maintain the aPTT at 1.5 to 2.5 times the normal
control value .
7. Which medication is the specific antidote for an opioid overdose?
A) Acetylcysteine
B) Flumazenil
C) Protamine sulfate
D) Naloxone
, Correct Answer: D) Naloxone
Rationale: Naloxone is a pure opioid antagonist that rapidly reverses life-threatening
respiratory depression caused by opioid overdose by competitively binding to opioid
receptors .
8. A patient is started on metformin for type 2 diabetes. What common side effect
should the nurse include in patient teaching?
A) Weight gain
B) Persistent dry cough
C) Gastrointestinal (GI) upset, such as nausea and diarrhea
D) Hyperglycemia
Correct Answer: C) Gastrointestinal (GI) upset, such as nausea and diarrhea.
Rationale: GI disturbances are the most common adverse effects associated with
metformin. These can often be minimized by taking the medication with food and
starting with a low dose that is gradually increased .
9. A patient is prescribed albuterol for asthma. What is the primary mechanism of
action of this drug?
A) Inhibiting the release of histamine.
B) Blocking muscarinic receptors in the lungs.
C) Stimulating beta-2 adrenergic receptors.
D) Reducing inflammation in the airway.
Correct Answer: C) Stimulating beta-2 adrenergic receptors.
Rationale: Albuterol is a short-acting beta-2 agonist (SABA). It works by stimulating
beta-2 receptors in the bronchial smooth muscle, leading to relaxation and
bronchodilation, which is critical for relieving acute asthma symptoms .
