Question

A patient has bacterial endocarditis, and a culture reveals Gram-positive streptococcus. Which antibiotic should the nurse expect to administer because it is a protein-synthesis inhibitor

Answer 1

Correct Answers:

Clindamycin (Cleocin)

Rationale :

🟦 Clindamycin is a protein-synthesis inhibitor that works by binding to the 50S ribosomal subunit of bacteria.

🟦 This action prevents peptide chain elongation, effectively stopping bacterial growth.

🟦 Clindamycin is effective against Gram-positive organisms, including streptococci, which are common causes of bacterial endocarditis.

🟦 It is especially useful in clients who have penicillin allergies.

🟦 Because the question specifically asks for a protein-synthesis inhibitor, clindamycin is the correct choice.

Amikacin (Amikin)

🟦 Aminoglycoside with ribosomal binding but not primary for streptococcal endocarditis.

🟦 It is mainly used for Gram-negative infections and carries a high risk of nephrotoxicity.

Tobramycin (Nebcin)

🟦 Primarily targets Gram-negative organisms, not streptococcus.

🟦 It is not typically used as the main agent for Gram-positive endocarditis.

Gentamicin (Garamycin)

🟦 Used as synergistic therapy, not as a primary protein-synthesis inhibitor for streptococcus.

🟦 It is often combined with beta-lactams rather than used alone.

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Answer 2

Correct Answers:

Serotonin blockers, such as ondansetron (Zofran)

Rationale :

🟦 Serotonin (5-HT₃) receptor blockers are the first-line antiemetics for preventing chemotherapy-induced nausea and vomiting (CINV).

🟦 Chemotherapy triggers release of serotonin from enterochromaffin cells in the GI tract.

🟦 Ondansetron blocks 5-HT₃ receptors in both the gut and the chemoreceptor trigger zone (CTZ).

🟦 This dual action makes it highly effective for acute nausea and vomiting associated with chemotherapy.

🟦 These drugs are routinely administered prophylactically before chemotherapy begins.

Prokinetic drugs

🟦 These medications increase gastric emptying rather than blocking emetic pathways.

🟦 They are not the primary agents for chemotherapy-related nausea.

Neuroleptic drugs

🟦 These agents provide sedation and dopamine blockade, but are not first-line for CINV.

🟦 They are used more often for motion sickness or postoperative nausea.

Anticholinergic drugs

🟦 These medications target the vestibular system, not chemotherapy pathways.

🟦 They are mainly used for motion-related nausea, not CINV.

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Answer 3

Correct Answers:

Probenecid (Benemid)

Rationale :

🟦 Probenecid is a uricosuric agent that specifically increases renal excretion of uric acid.

🟦 It works by inhibiting urate reabsorption in the renal tubules, lowering serum urate levels.

🟦 This medication is most effective in clients with inadequate urate excretion, as described in the scenario.

🟦 A serum urate level of 5 mg/dL with poor excretion indicates a need to enhance uric acid elimination, not reduce production.

🟦 Therefore, probenecid directly addresses the underlying pathophysiology in this patient.

Colchicine

🟦 Colchicine reduces inflammation during acute gout attacks.

🟦 It does not affect uric acid excretion or production.

Indomethacin (Indocin)

🟦 Indomethacin is an NSAID used for pain and inflammation in acute gout.

🟦 It does not alter urate levels.

Allopurinol (Zyloprim)

🟦 Allopurinol decreases uric acid production by inhibiting xanthine oxidase.

🟦 It is preferred for overproduction, not inadequate excretion.

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Answer 4

Correct Answers:

Growing in numbers of users
Used with traditional therapies

Rationale :

🟦 The market for medicinal herbs in the United States is growing in numbers of users, driven by interest in natural and complementary therapies.

🟦 Many individuals use herbal products alongside traditional (conventional) therapies, not as replacements.

🟦 This combined use reflects a trend toward integrative health care.

🟦 Herbal use is common across diverse age groups and health conditions.

🟦 Understanding these trends helps nurses provide safe, culturally sensitive education.

Heavily regulated by federal law

🟦 Medicinal herbs are regulated as dietary supplements, not as prescription drugs.

🟦 They are not heavily regulated for safety and efficacy before marketing.

Viewed with growing skepticism

🟦 Public interest has generally increased, not declined.

🟦 Skepticism exists among some clinicians, but consumer use continues to rise.

Used by less than 10% of the population

🟦 Usage exceeds 10% of the U.S. population.

🟦 Herbal products are widely used for wellness and chronic conditions.

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Answer 5

Correct Answers:

Low urine output

Rationale :

🟦 Muscarinic antagonists (anticholinergics) block parasympathetic (acetylcholine) activity in the body.

🟦 This blockade causes urinary retention by relaxing the detrusor muscle and tightening the urinary sphincter.

🟦 As a result, clients may experience difficulty voiding and decreased urine output.

🟦 Low urine output is a classic adverse effect seen with anticholinergic medications.

🟦 Recognizing this effect is essential to prevent bladder distention and urinary complications.

Hypernatremia

🟦 Anticholinergics do not directly alter serum sodium levels.

🟦 Electrolyte imbalance is not a typical adverse effect.

Hypovolemia

🟦 These drugs cause urinary retention, not fluid loss.

🟦 Hypovolemia is unrelated to muscarinic blockade.

Bradycardia

🟦 Muscarinic antagonists typically cause tachycardia, not slow heart rate.

🟦 Blocking parasympathetic input increases heart rate.

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Answer 6

Correct Answers:

Pruritic facial wheals
High-pitched inspiration

Rationale :

🟦 Penicillin hypersensitivity reactions are immune-mediated responses that can range from mild to life-threatening.

🟦 Pruritic facial wheals indicate urticaria (hives), a classic sign of an allergic reaction.

🟦 High-pitched inspiration suggests laryngeal edema or bronchospasm, which are manifestations of anaphylaxis.

🟦 These findings reflect histamine release and airway involvement, requiring immediate attention.

🟦 Early recognition is critical to prevent airway compromise and cardiovascular collapse.

Gustatory alterations

🟦 Changes in taste are a non-allergic side effect, not a hypersensitivity reaction.

🟦 They do not indicate immune system activation.

Dental discoloration

🟦 Dental staining is associated with tetracyclines, not penicillin.

🟦 It is unrelated to allergic reactions.

Nausea and anorexia

🟦 These are gastrointestinal side effects, not immune-mediated responses.

🟦 They do not signal hypersensitivity.

Frequent loose stools

🟦 Diarrhea reflects GI flora disruption, not allergy.

🟦 It is a common adverse effect, not a hypersensitivity sign.

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Answer 7

Correct Answers:

Atomoxetine (Strattera)

Rationale :

🟦 Atomoxetine is a non-stimulant medication used primarily for ADHD.

🟦 It works by selectively inhibiting norepinephrine reuptake, not by stimulating dopamine release.

🟦 Because it does not activate reward pathways in the brain, it has no addictive potential.

🟦 Atomoxetine is not a controlled substance, unlike many CNS stimulants.

🟦 This makes it an appropriate option for clients at risk for substance misuse.

Phentermine (Ionamin)

🟦 Phentermine is a sympathomimetic stimulant similar to amphetamines.

🟦 It carries a risk of dependence and abuse.

Ergotamine (Ergostat)

🟦 Ergotamine acts on serotonin and adrenergic receptors.

🟦 It is not used as a CNS stimulant and can cause vasoconstrictive toxicity.

Sumatriptan (Imitrex)

🟦 Sumatriptan is a serotonin (5-HT₁) agonist used for migraines.

🟦 It is not a CNS stimulant and does not address addiction risk in this context.

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Answer 8

Correct Answers:

Beta agonists

Rationale :

🟦 Beta₂ agonists (e.g., albuterol) are the first-line, rapid-acting bronchodilators for acute respiratory distress.

🟦 They quickly relax bronchial smooth muscle, reversing bronchospasm that causes wheezing and dyspnea.

🟦 Rapid bronchodilation improves airflow, reducing hypercapnia and correcting hypoxemia.

🟦 Onset is minutes, making them ideal for acute exacerbations.

🟦 Early use can prevent progression to respiratory failure.

Glucocorticoids

🟦 Reduce airway inflammation but have a delayed onset.

🟦 They are adjuncts, not first for immediate relief.

Anticholinergics

🟦 Provide bronchodilation but with slower onset than beta₂ agonists.

🟦 Often added if symptoms persist.

Leukotriene modifiers

🟦 Used for chronic control, not acute attacks.

🟦 Ineffective for immediate symptom relief.

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Answer 9

Correct Answers:

Clavulanic acid

Rationale :

🟦 Clavulanic acid is a beta-lactamase inhibitor that protects ampicillin from enzymatic destruction.

🟦 Some bacteria produce beta-lactamase enzymes that inactivate penicillin antibiotics like ampicillin.

🟦 Clavulanic acid binds irreversibly to these enzymes, allowing ampicillin to remain effective.

🟦 The combination broadens the antimicrobial spectrum against resistant organisms.

🟦 This strategy enhances therapeutic effectiveness and treatment success.

Carbamazepine

🟦 This is an anticonvulsant, not an antimicrobial enhancer.

🟦 It has no role in improving antibiotic activity.

Calcium citrate

🟦 Calcium supplements can interfere with absorption of some medications.

🟦 They do not increase antibiotic effectiveness.

Acetaminophen

🟦 Acetaminophen provides analgesic and antipyretic effects only.

🟦 It does not interact with or potentiate antibiotics.

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Answer 10

Correct Answers:

Weight gain of 0.68 kg

Rationale :

🟦 Ampicillin IV contains sodium, which can contribute to fluid retention, especially in clients with heart disease.

🟦 An overnight weight gain of 0.68 kg (≈1.5 lb) suggests acute fluid overload, which is clinically significant.

🟦 Fluid overload can exacerbate heart failure, leading to pulmonary edema and compromised cardiac function.

🟦 Weight changes are a sensitive and early indicator of fluid balance alterations.

🟦 Prompt recognition allows the nurse to intervene early and prevent cardiopulmonary complications.

Heart rate 94 beats/min and regular

🟦 This heart rate is within an acceptable range for an older adult.

🟦 It does not indicate acute deterioration.

Potassium 4.0 mEq/L

🟦 This value is within the normal reference range.

🟦 It does not require immediate action.

Hemoglobin 10.5 g/dL

🟦 Mild anemia may be chronic in older adults.

🟦 It is not an acute change related to IV ampicillin administration.

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Pharmacology Exam Final

No.

1 :
A patient has bacterial endocarditis, and a culture reveals Gram-positive streptococcus. Which antibiotic should the nurse expect to administer because it is a protein-synthesis inhibitor

2 :
A patient is taking chemotherapy with a drug that has a high potential for causing nausea and vomiting. The nurse is preparing to administer an antiemetic drug. Which class of antiemetic drugs is most commonly used to prevent nausea and vomiting for patients receiving chemotherapy?

3 :
A patient who experiences gout has a serum urate level of 5 mg/dL and inadequate urate excretion. Which medication indicated in the treatment of gout is the best choice to improve the excretion of urate for this patient?

4 :
Which descriptions apply to the market for medicinal herbs in the United States? (Select all that apply.)

5 :
A patient who experiences an adverse effect of a muscarinic antagonist would present with:

6 :
Which patient assessment findings are clinical indicators of a hypersensitivity reaction to penicillin? (Select all that apply.)

7 :
Which CNS stimulant is not addictive?

8 :
Which medication is administered first to a patient who has acute dyspnea, wheezing, hypercapnia, and hypoxemia?

9 :
To increase its effectiveness, which medication should the nurse administer with ampicillin (Principen)?

10 :
A 66-year-old patient with heart disease requires ampicillin (Principe) IV for an infection. Which overnight change in the patient’s assessment findings is the nurse’s priority?

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Pharmacology Exam Final

No.

1 : A patient has bacterial endocarditis, and a culture reveals Gram-positive streptococcus. Which antibiotic should the nurse expect to administer because it is a protein-synthesis inhibitor

2 : A patient is taking chemotherapy with a drug that has a high potential for causing nausea and vomiting. The nurse is preparing to administer an antiemetic drug. Which class of antiemetic drugs is most commonly used to prevent nausea and vomiting for patients receiving chemotherapy?

3 : A patient who experiences gout has a serum urate level of 5 mg/dL and inadequate urate excretion. Which medication indicated in the treatment of gout is the best choice to improve the excretion of urate for this patient?

4 : Which descriptions apply to the market for medicinal herbs in the United States? (Select all that apply.)

5 : A patient who experiences an adverse effect of a muscarinic antagonist would present with:

6 : Which patient assessment findings are clinical indicators of a hypersensitivity reaction to penicillin? (Select all that apply.)

7 : Which CNS stimulant is not addictive?

8 : Which medication is administered first to a patient who has acute dyspnea, wheezing, hypercapnia, and hypoxemia?

9 : To increase its effectiveness, which medication should the nurse administer with ampicillin (Principen)?

10 : A 66-year-old patient with heart disease requires ampicillin (Principe) IV for an infection. Which overnight change in the patient’s assessment findings is the nurse’s priority?

1 :
A patient has bacterial endocarditis, and a culture reveals Gram-positive streptococcus. Which antibiotic should the nurse expect to administer because it is a protein-synthesis inhibitor

2 :
A patient is taking chemotherapy with a drug that has a high potential for causing nausea and vomiting. The nurse is preparing to administer an antiemetic drug. Which class of antiemetic drugs is most commonly used to prevent nausea and vomiting for patients receiving chemotherapy?

3 :
A patient who experiences gout has a serum urate level of 5 mg/dL and inadequate urate excretion. Which medication indicated in the treatment of gout is the best choice to improve the excretion of urate for this patient?

4 :
Which descriptions apply to the market for medicinal herbs in the United States? (Select all that apply.)

5 :
A patient who experiences an adverse effect of a muscarinic antagonist would present with:

6 :
Which patient assessment findings are clinical indicators of a hypersensitivity reaction to penicillin? (Select all that apply.)

7 :
Which CNS stimulant is not addictive?

8 :
Which medication is administered first to a patient who has acute dyspnea, wheezing, hypercapnia, and hypoxemia?

9 :
To increase its effectiveness, which medication should the nurse administer with ampicillin (Principen)?

10 :
A 66-year-old patient with heart disease requires ampicillin (Principe) IV for an infection. Which overnight change in the patient’s assessment findings is the nurse’s priority?