NUR 210 Principles of Pharmacology Comprehensive Practice Exam: 300 Questions with Rationales Galen College of Nursing | Medical-Surgical Nursing I

NUR 210 Principles of Pharmacology Comprehensive Practice Exam: 300 Questions with Rationales Galen College of Nursing | Medical-Surgical Nursing I --- Table of Contents Section 1: Pharmacokinetics and Pharmacodynamics (Questions 1-40) This section covers absorption, distribution, metabolism, excretion, and drug-receptor interactions. Section 2: Medication Administration and Safety (Questions 41-80) This section addresses the rights of medication administration, dosage calculations, and error prevention. Section 3: Drug Classifications – Antibiotics and Antivirals (Questions 81-120) This section covers antimicrobial agents, mechanisms of action, and nursing considerations. Section 4: Drug Classifications – Cardiovascular Medications (Questions 121-155) This section addresses antihypertensives, antiarrhythmics, and medications affecting cardiac function. Section 5: Drug Classifications – Neurological and Psychiatric Medications (Questions 156-190) This section covers medications for pain, anxiety, depression, seizures, and neurological disorders. Section 6: Drug Classifications – Endocrine and Respiratory Medications (Questions 191-225) This section addresses insulin, oral hypoglycemics, corticosteroids, and respiratory drugs. Section 7: Drug Interactions, Adverse Effects, and Toxicity (Questions 226-260) This section covers drug-drug interactions, adverse reactions, and management of toxicity. Section 8: Patient Education and Special Populations (Questions 261-300) This section addresses teaching strategies, pediatric and geriatric considerations, and safe medication practices. --- NUR 210 Principles of Pharmacology Comprehensive Practice Exam --- Section 1: Pharmacokinetics and Pharmacodynamics (Questions 1-40) --- 1. The nurse is teaching a patient about a new medication. Which statement best describes the term "pharmacokinetics"? A. The study of how drugs interact with target receptors B. The study of how drugs move through the body including absorption, distribution, metabolism, and excretion C. The study of the therapeutic effects of medications D. The study of drug toxicity and adverse reactions Answer: B Rationale: Pharmacokinetics describes what the body does to the drug, specifically absorption, distribution, metabolism, and excretion (ADME). 2. A patient asks the nurse why some medications are given intravenously rather than orally. Which response by the nurse is most accurate? A. "IV medications are safer than oral medications." B. "IV medications bypass the first-pass effect and have 100% bioavailability." C. "IV medications are easier to administer in a hospital setting." D. "IV medications are less expensive than oral medications." Answer: B Rationale: IV administration bypasses first-pass metabolism in the liver and delivers the drug directly into circulation, providing complete bioavailability. 3. The nurse is caring for a patient with liver disease. Which pharmacokinetic process is most likely to be impaired in this patient? A. Absorption B. Distribution C. Metabolism D. Excretion Answer: C Rationale: The liver is the primary site of drug metabolism. Liver disease can significantly impair the metabolism of many medications. 4. A patient with renal failure is receiving a medication that is primarily excreted by the kidneys. The nurse should anticipate which of the following? A. A decrease in the medication's half-life B. An increase in the medication's half-life and risk of toxicity C. A decrease in the medication's therapeutic effect D. No change in medication dosing is needed Answer: B Rationale: Impaired renal function reduces drug excretion, leading to accumulation of the drug in the body, prolonged half-life, and increased risk of toxicity. 5. The nurse is explaining the difference between a drug's therapeutic effect and its side effect. Which statement by the nurse is correct? A. "Therapeutic effects are always desired, and side effects are always harmful." B. "Therapeutic effects are the intended actions, while side effects are unintended but often predictable." C. "Side effects only occur with over-the-counter medications." D. "Therapeutic effects are the same for all patients." Answer: B Rationale: Therapeutic effects are the desired pharmacological actions, while side effects are predictable, unintended effects that may or may not be harmful. 6. A patient's medication has a narrow therapeutic index. The nurse understands that this means: A. The medication is safe at any dose. B. There is a small margin between the therapeutic dose and toxic dose. C. The medication has a wide margin of safety. D. The medication is only effective in small doses. Answer: B Rationale: A narrow therapeutic index indicates that the dose needed for therapeutic effect is close to the dose that can cause toxicity, requiring careful monitoring. 7. The nurse is preparing to administer a medication that is highly protein-bound. Which condition would increase the risk of toxicity from this medication? A. Dehydration B. Hypoalbuminemia C. Polycythemia D. Hyperglycemia Answer: B Rationale: Hypoalbuminemia (low serum albumin) means fewer protein-binding sites, leading to more free (active) drug in circulation and increased risk of toxicity. 8. A patient asks the nurse why a medication is given at a specific time of day. The nurse explains that this is based on: A. The patient's preference B. Hospital policy C. The drug's chronopharmacology or circadian rhythm effects D. The availability of the medication Answer: C Rationale: Some medications are timed to correspond with biological rhythms or to optimize absorption and minimize side effects. 9. The nurse is teaching a patient about a medication that has a half-life of 24 hours. The patient asks what this means. The nurse's best response is: A. "It means the medication is completely out of your body in 24 hours." B. "It means that half of the medication is eliminated from your body every 24 hours." C. "It means you need to take the medication every 24 hours." D. "It means the medication is only effective for 24 hours." Answer: B Rationale: Half-life is the time required for the body to eliminate 50% of the drug's concentration. It takes approximately 4-5 half-lives for a drug to be essentially eliminated. 10. A patient is taking two medications that are both metabolized by the same liver enzyme system. The nurse should monitor for: A. Decreased effectiveness of both medications B. Increased risk of drug interactions and altered metabolism C. Increased excretion of both medications D. No significant changes in drug levels Answer: B Rationale: When two drugs compete for the same metabolic pathway, they can inhibit each other's metabolism, leading to increased drug levels and potential toxicity. 11. The nurse is caring for a patient who is receiving a medication with a volume of distribution (Vd) that is greater than total body water. The nurse understands that this indicates: A. The medication is only found in the plasma B. The medication is extensively distributed into tissues C. The medication is rapidly excreted D. The medication is highly bound to proteins Answer: B Rationale: A large volume of distribution suggests that the drug is highly distributed into tissues and is not confined to the plasma compartment. 12. Which of the following routes of administration has the fastest onset of action? A. Oral B. Intramuscular C. Intravenous D. Subcutaneous Answer: C Rationale: IV administration delivers medication directly into the bloodstream, resulting in immediate absorption and the fastest onset of action. 13. The nurse is reviewing the concept of bioavailability with a patient. Which statement by the nurse is most accurate? A. "Bioavailability is the amount of drug that is excreted unchanged." B. "Bioavailability is the fraction of the administered drug that reaches systemic circulation." C. "Bioavailability is the time it takes for the drug to start working." D. "Bioavailability is the maximum effect of the drug." Answer: B Rationale: Bioavailability refers to the fraction of the administered dose that reaches the systemic circulation and is available to produce an effect. 14. A patient is receiving a medication that is a weak acid. The nurse understands that this drug is more likely to be absorbed in which part of the gastrointestinal tract? A. The stomach (acidic environment) B. The small intestine (alkaline environment) C. The colon D. The rectum Answer: A Rationale: Weak acids are non-ionized and better absorbed in acidic environments like the stomach. Weak bases are better absorbed in alkaline environments. 15. The nurse is teaching a patient about the importance of taking a medication with food. This is primarily related to which pharmacokinetic principle? A. Distribution B. Metabolism C. Absorption D. Excretion Answer: C Rationale: Food can affect the rate and extent of drug absorption by altering gastric emptying, pH, or direct interaction with the drug. 16. A patient is prescribed a medication that is an agonist at a specific receptor. The nurse explains that an agonist works by: A. Blocking the receptor and preventing the natural substance from binding B. Binding to the receptor and activating it, producing a response C. Binding to the receptor but producing no response D. Inhibiting the breakdown of the natural substance Answer: B Rationale: An agonist binds to a receptor and activates it, producing a physiological response similar to the body's natural substance. 17. The nurse is caring for a patient who is receiving a medication that is an antagonist. The nurse understands that an antagonist works by: A. Activating the receptor to produce a response B. Binding to the receptor but not activating it, blocking the natural substance C. Increasing the production of the natural substance D. Enhancing the effects of the natural substance Answer: B Rationale: An antagonist binds to a receptor without activating it, preventing the natural substance (or an agonist) from binding and producing a response. 18. A patient's medication has a high first-pass effect. The nurse anticipates that the prescriber will: A. Increase the oral dose significantly B. Use a non-oral route of administration C. Decrease the oral dose significantly D. Change the frequency of administration Answer: B Rationale: A high first-pass effect means that a large portion of the drug is metabolized in the liver before reaching systemic circulation. An alternative route (like sublingual or IV) avoids this effect. 19. The nurse is assessing a patient who is receiving a medication that is known to induce hepatic enzymes. The nurse should monitor for: A. Increased effectiveness of other medications B. Decreased effectiveness of other medications metabolized by the same pathway C. Increased risk of toxicity from the inducing drug D. Decreased clearance of the inducing drug Answer: B Rationale: Enzyme induction increases the metabolism of other drugs, which can decrease their therapeutic effectiveness. 20. A patient asks the nurse why they need to take a medication on an empty stomach. The nurse explains that this is because: A. Food will reduce the absorption of the medication B. Food will increase the absorption of the medication C. The medication will cause nausea with food D. The medication works faster on an empty stomach Answer: A Rationale: Some medications should be taken on an empty stomach because food significantly reduces their absorption, making them less effective.