Which actions by the nurse demonstrate an understanding of pharmacokinetics and the nurse's role in medication therapy? (Select All that Apply.)

Verify the dose based on the client's age, weight, and organ function.

Administering the medication at the prescribed time to maintain therapeutic drug levels.

Ignoring drug interactions if the client reports no side effects.

Recommending herbal supplements to enhance medication effectiveness.

Educating the client about how food or other medications can affect absorption.

Monitoring the client's liver and kidney function before administering medications.

Answer and Explanation

Correct Answer : A,B,E,F

A. Verify the dose based on the client's age, weight, and organ function: Pharmacokinetics involves absorption, distribution, metabolism, and excretion. Age, body weight, and hepatic or renal function directly affect drug metabolism and elimination. Verifying appropriate dosing helps prevent toxicity or subtherapeutic effects.

B. Administering the medication at the prescribed time to maintain therapeutic drug levels: Maintaining consistent serum drug levels supports steady state and therapeutic effectiveness. Proper timing reflects understanding of half-life and dosing intervals.

C. Ignoring drug interactions if the client reports no side effects: This is incorrect. Drug interactions can alter metabolism or excretion and may not immediately produce noticeable side effects. Nurses must always assess for potential interactions.

D. Recommending herbal supplements to enhance medication effectiveness: This is inappropriate. Herbal supplements can significantly alter drug absorption or metabolism and should not be recommended without provider oversight.

E. Educating the client about how food or other medications can affect absorption: Food and concurrent medications can alter absorption rates and bioavailability. Client education supports safe and effective medication therapy.

F. Monitoring the client's liver and kidney function before administering medications: The liver and kidneys are primary organs for drug metabolism and excretion. Monitoring their function helps guide safe dosing and prevent accumulation or toxicity.

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Correct Answer is C

Explanation

A. "I'll report any new confusion, dizziness, or unsteady gait that occurs after starting a new medication.": Older adults are more susceptible to central nervous system effects due to altered pharmacokinetics and increased blood-brain barrier permeability. Symptoms such as confusion, dizziness, or gait instability increase fall risk and may indicate drug accumulation or sensitivity.

B. “I’ll avoid abruptly stopping any medication, even if I start to feel better.": Abrupt discontinuation of certain medications, such as beta-blockers, benzodiazepines, or antidepressants, can result in rebound effects or withdrawal symptoms. Gradual tapering is often required to maintain physiologic stability.

C. "Because my metabolism has slowed down, it might take longer for medications to start working, so I can take another dose if I don't feel better.": Age-related reductions in hepatic metabolism and renal clearance increase the risk of drug accumulation and toxicity. Taking an extra dose without provider guidance can lead to supratherapeutic levels and adverse effects.

D. "Since my kidneys don't clear drugs as efficiently, I should avoid taking over-the-counter medications unless approved by my provider.": Renal function often declines with age, reducing drug clearance and increasing susceptibility to toxicity. Many over-the-counter medications, including NSAIDs and antihistamines, can impair renal function or interact with prescribed therapies.

A. "This medication blocks opioid receptors so opioids cannot produce a euphoric effect." B. "This medication increases serotonin levels to improve mood and decrease drug use." C. "This medication replaces opioids in my body to prevent cravings." D. "This medication reduces withdrawal symptoms by partially activating opioid receptors."

Correct Answer is A

Explanation

A. "This medication blocks opioid receptors so opioids cannot produce a euphoric effect.": Naltrexone is a competitive opioid antagonist that binds to mu-opioid receptors without activating them. By occupying these receptors, it prevents exogenous opioids from producing euphoric or reinforcing effects, helping to reduce the risk of relapse in individuals with opioid use disorder.

B. "This medication increases serotonin levels to improve mood and decrease drug use.": Medications that increase serotonin, such as selective serotonin reuptake inhibitors (SSRIs), target depression and anxiety, not opioid receptor activity. Naltrexone’s mechanism does not involve modulation of serotonin or other monoamine neurotransmitters.

C. "This medication replaces opioids in my body to prevent cravings.": Medications like methadone or buprenorphine act as opioid agonists or partial agonists to prevent withdrawal and cravings. Naltrexone does not replace opioids or provide agonist activity; it strictly blocks receptor activation.

D. "This medication reduces withdrawal symptoms by partially activating opioid receptors.": Partial agonists such as buprenorphine can reduce withdrawal symptoms by providing low-level receptor stimulation. Naltrexone, however, is a pure antagonist and does not activate receptors, so it does not alleviate withdrawal symptoms and should only be started after detoxification.

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Which actions by the nurse demonstrate an understanding of pharmacokinetics and the nurse's role in medication therapy? (Select All that Apply.)

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is A

Explanation

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