BY MICHELLE ERNSTMEYER AND ELIZABETH
CHRISTMANQUESTIONS & 100% VERIFIED ANSWERS AND
RATIONALES | GRADED A+LATEST UPDATE
, TABLE OF CONTENTS
Textbook chapters
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Chapter 1:Pharmacokinetics &Pharmacodynamics: Includes basic concepts such as
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absorption, distribution, metabolism, and excretion.
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Chapter 2:Legal/Ethical: Covers safe medication administration, legal guidelines, and
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preventing medication errors.
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Chapter 3:Antimicrobials: Focuses on various antimicrobial therapies, including
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penicillins, cephalosporins, antivirals, and antifungals.
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Chapter 4:Autonomic Nervous System: Discusses medications related to the
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autonomic nervous system, including agonists and antagonists.
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Chapter 5:Respiratory System: Covers medications used for respiratory disorders,
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such as antihistamines, decongestants, and corticosteroids.
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Chapter 6:Cardiovascular &RenalSystems:Addresses medications for the
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cardiovascular and renal systems, including antiarrhythmics, diuretics, and
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antihypertensives.
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Chapter 7:Gastrointestinal System:Focusesonmedications for the GIsystem, such as
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antiulcer medications, laxatives, and antiemetics.
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Chapter 8:Central Nervous System: Covers CNSdepressants, stimulants,
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antidepressants, and anticonvulsants.
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Chapter 9:Endocrine System: Explores endocrine medications, including
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corticosteroids, antidiabetics, and thyroid medications.
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Chapter 10:Analgesics&MusculoskeletalSystem: Includes nonopioid and opioid
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analgesics, as well as anesthetics.
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,CHAPTER1 — PHARMACOKINETICS& PHARMACODYNAMICS fc cf cf fc cf
Question1 fc
Anurseis teaching a newly licensed nurse aboutdrug absorption.Which factor
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primarily affects the rate ofabsorptionafter oral administration?
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A. Volume ofdistribution cf cf
B. Gastricemptying time cf c f
C. Hepatic enzyme activity cf cf
D. Protein binding cf
Correctanswer:B. Gastricemptying time
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Rationale:
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B is correct.Gastric emptying time determines how quickly an orally
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cf administered drugreaches thesmall intestine, where mostabsorptionoccurs; cf cf cf cf cf c f cf fc fc
cf faster emptying → more rapid absorption. cf cf cf cf cf
A(Volumeofdistribution)affectsdistribution, notinitial absorptionrate.
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C(Hepaticenzyme activity) influences metabolism (first-pass effect)and
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cf clearance, not the absorption rate from the GI tract. c f cf cf cf cf cf cf cf
D(Proteinbinding) affects freedrugavailable fordistribution andaction,
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not the physical process/rateof absorption across the GI mucosa.
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Question2 fc
A68-year-old patient with decreased renal function is prescribeda drug that is
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90%renally excretedunchanged. Whichpharmacokinetic changeis mostlikely and
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cf requires nurse action? cf cf
A. Increasedhepatic metabolism leading tosubtherapeutic levels cf cf cf c f cf cf
, B. Decreasedhalf-life requiring morefrequent dosing cf c f cf cf cf
C. Accumulation ofthe drugcausing toxicity cf fc cf fc cf
D. Increasedfirst-passeffectreducing bioavailability fc fc cf cf
Correctanswer:C. Accumulationof the drug causingtoxicity Rationale:
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C is correct.Impaired renal excretion leads to decreased clearance of renally
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cf eliminated drugsandincreasedaccumulation →higher plasmalevels and c f fc fc fc cf fc cf cf cf
potential toxicity. Nurse should notify prescriber and anticipate dose reduction
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or extended interval.
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A(Increasedhepaticmetabolism)is unrelated torenal excretion.
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B(Decreasedhalf-life)is oppositeofexpected; renal impairment typically
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increases half-life. cf
D(Increasedfirst-passeffect)refers to hepatic metabolism and would
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decreasebioavailability; notthe primary issue with renal impairment.
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Question3 fc
Whichstatement bestdescribesvolume ofdistribution (Vd)?
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A. Vdindicates howrapidly a drug is absorbedfromthe GI tract.
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B. Ahigh Vdsuggestsextensive distribution into tissues.
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C. Vdis adirect measureofplasmaprotein binding.
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D. Vdequals thepercentage ofdrugeliminated bythekidneys.
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Correctanswer:B. A high Vd suggests extensive distribution into tissues.
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Rationale:
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