Question

What should the nurse use to help prevent ototoxicity in a patient receiving gentamicin (Garamycin)? (Select all that apply.)

Answer 1

Correct Answers:

Baseline renal function
A low trough level
Baseline hearing acuity

Rationale :

💠 Baseline renal function is essential because gentamicin is primarily excreted by the kidneys, and impaired renal clearance leads to drug accumulation, increasing the risk of ototoxicity and nephrotoxicity.

💠 Assessing kidney function before therapy allows the nurse to anticipate dose adjustments and safe dosing intervals, which directly helps prevent toxic serum levels.

💠 A low trough level is critical because elevated trough concentrations are strongly associated with inner ear damage, particularly to the cochlear and vestibular systems.

💠 Monitoring and maintaining low trough levels ensures the drug concentration falls adequately before the next dose, reducing cumulative toxicity.

💠 Baseline hearing acuity provides a comparison point so early changes in hearing or balance can be detected promptly, allowing discontinuation before permanent damage occurs.

💠 Superinfection prevention does not prevent ototoxicity because it focuses on secondary infections, not drug-related damage to the auditory or vestibular system.

💠 Ototoxicity is specifically linked to serum drug levels and organ sensitivity, not microbial overgrowth.

💠 A high trough level increases the risk of ototoxicity because toxic drug concentrations remain in the body, leading to progressive inner ear damage.

💠 High troughs are a known warning sign for aminoglycoside toxicity, not a protective measure.

💠 0.9% NaCl solution is used for IV compatibility or hydration, but it does not reduce the ototoxic effects of gentamicin.

💠 Fluid choice alone does not influence inner ear drug accumulation.

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Answer 2

Correct Answers:

Trade

Rationale :

💠 A single medication can be marketed by multiple pharmaceutical companies, each assigning its own brand (trade) name.

💠 These names are created for marketing and commercial identification, not for scientific standardization.

💠 As patents expire, additional manufacturers release the same drug under new trade names, increasing variations.

💠 Despite different brand names, the active ingredient remains identical across products.

💠 This is why nurses often encounter many brand names for one drug in clinical practice.

Generic names are standardized and universal.

💠 Each drug has only one approved generic name, which does not change across manufacturers.

💠 This standardization helps reduce medication errors.

Chemical names are highly specific and fixed.

💠 They describe the exact molecular structure of the compound.

💠 Because of their precision, they do not vary.

Prodrug refers to drug activation, not naming variety.

💠 A prodrug is an inactive form that becomes active in the body.

💠 This classification does not create multiple names for the same compound.

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Answer 3

Correct Answers:

Complete blood count

Rationale :

💠 Linezolid is associated with myelosuppression, most notably thrombocytopenia, especially with therapy longer than 10–14 days.

💠 A CBC allows early detection of falling platelet, hemoglobin, or white blood cell levels before serious complications occur.

💠 Bone marrow suppression can lead to bleeding, anemia, or increased infection risk if not identified promptly.

💠 Regular CBC monitoring supports timely dose adjustment or discontinuation of the drug.

💠 This monitoring is a key nursing responsibility to prevent life-threatening hematologic complications.

Alkaline phosphatase does not monitor the primary toxicity of linezolid.

💠 This lab reflects liver or bone function, not bone marrow activity.

💠 Linezolid’s major risk is hematologic, not hepatic.

Peak and trough drug levels are not routinely required for linezolid.

💠 Linezolid does not require therapeutic drug monitoring like aminoglycosides.

💠 Toxicity risk is linked to duration of therapy, not serum peaks or troughs.

Serum creatinine level does not predict linezolid toxicity.

💠 Linezolid is not primarily nephrotoxic.

💠 Renal monitoring does not prevent its bone marrow–related adverse effects.

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Answer 4

Correct Answers:

Atomoxetine (Strattera)

Rationale :

💠 Atomoxetine works by selectively inhibiting norepinephrine reuptake, not by stimulating dopamine release in the brain’s reward pathways.

💠 Because it does not cause euphoria or reinforcement, it has no abuse potential.

💠 It is not classified as a controlled substance, unlike most CNS stimulants.

💠 This makes it a safer long-term option for patients with ADHD and substance-use risk.

💠 Nurses monitor for blood pressure or mood changes, not dependence or withdrawal.

Phentermine (Ionamin) has addictive potential.

💠 It is a sympathomimetic amine similar to amphetamines.

💠 It stimulates the CNS and can lead to dependence and misuse.

Sumatriptan (Imitrex) is not a CNS stimulant.

💠 It is a serotonin (5-HT₁) receptor agonist used for migraines.

💠 Addiction risk is not the issue; it does not act as a stimulant.

Ergotamine (Ergostat) is also not a CNS stimulant.

💠 It is used for migraine management through vasoconstriction.

💠 It carries toxicity risks but not stimulant addiction concerns.

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Answer 5

Correct Answers:

True

Rationale :

💠 Allopurinol works by blocking xanthine oxidase, the enzyme responsible for converting purines into uric acid.

💠 This action leads to reduced formation of uric acid, rather than increasing its excretion.

💠 Lower uric acid levels help prevent gout attacks and reduce urate crystal deposition in joints.

💠 It is commonly prescribed for chronic gout and hyperuricemia, not for acute gout flares.

💠 Consistent use helps prevent long-term complications such as tophi and kidney stones.

False is incorrect because allopurinol does not increase uric acid levels.

💠 Instead, it directly suppresses uric acid synthesis at the enzymatic level.

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Answer 6

Correct Answers:

Reinforcing the need to adhere to therapy

Rationale :

💠 Adherence to antiretroviral therapy (ART) is the most critical intervention for patients with AIDS because it suppresses viral replication and improves immune function.

💠 Improved immune status helps the body better fight opportunistic infections such as oral and esophageal candidiasis.

💠 Consistent therapy also slows progression of AIDS-related malignancies, including cervical carcinoma.

💠 Poor adherence leads to treatment failure, drug resistance, and worsening immunosuppression.

💠 Ensuring the patient understands and follows therapy directly impacts survival and quality of life.

Protecting the patient from environmental pathogens is supportive but not the top priority.

💠 Infection prevention is important, but it does not address the underlying immune suppression.

💠 Without ART adherence, infection risk remains high.

Instructing the patient to avoid tub bathing is not a priority intervention.

💠 Bathing practices have minimal impact on systemic immune function.

💠 This does not address opportunistic infections or cancer progression.

Improving nutritional status is beneficial but secondary.

💠 Nutrition supports healing, but it cannot replace viral suppression through therapy.

💠 Immune recovery depends primarily on consistent ART use.

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Answer 7

Correct Answers:

Production of prostaglandins

Rationale :

💠 Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that inhibits cyclooxygenase (COX) enzymes, which are required for prostaglandin synthesis.

💠 Prostaglandins protect the gastric lining by promoting mucus and bicarbonate secretion and maintaining adequate blood flow to the stomach mucosa.

💠 When prostaglandin production is reduced, the gastric mucosa becomes vulnerable to acid-related injury.

💠 This increases the risk for gastritis, gastric erosion, and peptic ulcer disease.

💠 The loss of prostaglandin-mediated protection explains why NSAIDs are associated with GI bleeding.

Propulsive action of peristalsis is not affected by ibuprofen.

💠 NSAIDs do not interfere with smooth muscle contractions of the GI tract.

💠 Peristalsis remains intact during NSAID use.

Secretion of bicarbonate is indirectly affected, not directly inhibited.

💠 Ibuprofen does not block bicarbonate secretion directly.

💠 Reduced bicarbonate occurs secondarily due to decreased prostaglandins, not as a primary effect.

Integrity of the mucous membrane is compromised indirectly.

💠 Ibuprofen does not directly destroy the mucous layer.

💠 Damage occurs because protective prostaglandins are suppressed.

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Answer 8

Correct Answers:

Abdominal pain and cramping
Profuse watery, bloody diarrhea

Rationale :

💠 Broad-spectrum antibiotics disrupt normal gut flora, allowing C. difficile overgrowth and toxin production.

💠 Abdominal pain and cramping reflect colonic inflammation caused by toxin-mediated mucosal injury.

💠 Profuse watery or bloody diarrhea is a hallmark of severe C. difficile infection and signals high toxin burden.

💠 In critically ill patients (e.g., septic shock, TPN), this can rapidly progress to toxic megacolon, perforation, sepsis, and death.

💠 Early recognition prompts immediate isolation, stool testing, and targeted therapy, which is lifesaving.

Tachycardia and hypotension are common in septic shock and do not specifically indicate a drug-related lethal complication.

💠 These signs reflect hemodynamic instability, not antibiotic toxicity.

Muscle wasting and weight loss suggest chronic catabolism or malnutrition, not an acute pharmacotherapy emergency.

💠 They do not point to an immediate lethal complication.

Total leukocyte count of 14,000/mm³ can occur with infection or stress and is nonspecific.

💠 While leukocytosis may accompany C. difficile, it alone is not diagnostic.

Day 7 of antibiotic regimen is a timing detail, not an assessment finding.

💠 Duration alone does not confirm a lethal adverse effect.

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Answer 9

Correct Answers:

Ezetimibe (Zetia)

Rationale :

💠 Ezetimibe selectively inhibits the NPC1L1 transporter at the intestinal brush border, which is responsible for dietary and biliary cholesterol uptake.

💠 By reducing intestinal absorption, less cholesterol reaches the liver, leading to lower circulating LDL cholesterol levels.

💠 This mechanism works independently of hepatic cholesterol synthesis, making it complementary to statins.

💠 Ezetimibe is especially useful for patients who cannot tolerate high-dose statins.

💠 The drug effectively lowers LDL without significantly affecting triglycerides or HDL.

Cholestyramine (Questran) reduces cholesterol by binding bile acids in the intestine, not by blocking cholesterol absorption.

💠 Its effect is indirect, increasing bile acid excretion and hepatic cholesterol use.

Niacin (Niaspan) lowers cholesterol by decreasing hepatic VLDL synthesis and increasing HDL.

💠 It does not act at the intestinal absorption level.

Rosuvastatin (Crestor) lowers cholesterol by inhibiting HMG-CoA reductase in the liver.

💠 This reduces cholesterol synthesis, not intestinal absorption.

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Answer 10

Correct Answers:

Hematuria

Rationale :

💠 Cotrimoxazole can cause crystal formation in the renal tubules, especially when urine is concentrated.

💠 These crystals irritate the urinary tract lining, leading to blood in the urine (hematuria).

💠 Hematuria reflects direct urinary system involvement, making it a specific warning sign of crystalluria.

💠 Early reporting allows prompt interventions such as increasing fluid intake and reassessing therapy.

💠 Prompt action helps prevent progression to renal obstruction or acute kidney injury.

Vomiting is a nonspecific gastrointestinal side effect and does not indicate urinary crystal formation.

💠 It does not reflect renal irritation or urinary tract injury.

Severe rash suggests a hypersensitivity reaction (e.g., Stevens–Johnson syndrome), not crystalluria.

💠 Skin findings are unrelated to urinary crystal deposition.

Fever may indicate infection or drug reaction but is not specific to crystalluria.

💠 It does not localize pathology to the kidneys or urinary tract.

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Pharmacology and Therapeutics Final Examination

No.

1 :
What should the nurse use to help prevent ototoxicity in a patient receiving gentamicin (Garamycin)? (Select all that apply.)

2 :
Which drug name is likely to have the most variations for a single compound?

3 :
Which laboratory parameter should the nurse monitor in a patient taking linezolid (Zyvox) to prevent a serious complication of therapy?

4 :
Which CNS stimulant is not addictive?

5 :
allopurinol: Prevent uric acid production.

6 :
A female patient has AIDS and is experiencing a superinfection of oral and esophageal candidiasis, and carcinoma of the cervix. Which intervention is the nurse's priority?

7 :
Which protective mechanism of the gastrointestinal tract is blunted by the use of ibuprofen (Motrin)?

8 :
A patient in septic shock is receiving several antibiotics and total parenteral nutrition (TPN). Which patient assessment findings indicate a potentially lethal complication of the pharmacotherapy? (Select all that apply.)

9 :
Which antilipemic medication reduces serum cholesterol by inhibiting its absorption in the small intestine?

10 :
A patient is taking cotrimoxazole (Bactrim) for a urinary tract infection. Which finding should the nurse instruct the patient to report as the best indication of crystalluria?

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Pharmacology and Therapeutics Final Examination

No.

1 : What should the nurse use to help prevent ototoxicity in a patient receiving gentamicin (Garamycin)? (Select all that apply.)

2 : Which drug name is likely to have the most variations for a single compound?

3 : Which laboratory parameter should the nurse monitor in a patient taking linezolid (Zyvox) to prevent a serious complication of therapy?

4 : Which CNS stimulant is not addictive?

5 : allopurinol: Prevent uric acid production.

6 : A female patient has AIDS and is experiencing a superinfection of oral and esophageal candidiasis, and carcinoma of the cervix. Which intervention is the nurse's priority?

7 : Which protective mechanism of the gastrointestinal tract is blunted by the use of ibuprofen (Motrin)?

8 : A patient in septic shock is receiving several antibiotics and total parenteral nutrition (TPN). Which patient assessment findings indicate a potentially lethal complication of the pharmacotherapy? (Select all that apply.)

9 : Which antilipemic medication reduces serum cholesterol by inhibiting its absorption in the small intestine?

10 : A patient is taking cotrimoxazole (Bactrim) for a urinary tract infection. Which finding should the nurse instruct the patient to report as the best indication of crystalluria?

1 :
What should the nurse use to help prevent ototoxicity in a patient receiving gentamicin (Garamycin)? (Select all that apply.)

2 :
Which drug name is likely to have the most variations for a single compound?

3 :
Which laboratory parameter should the nurse monitor in a patient taking linezolid (Zyvox) to prevent a serious complication of therapy?

4 :
Which CNS stimulant is not addictive?

5 :
allopurinol: Prevent uric acid production.

6 :
A female patient has AIDS and is experiencing a superinfection of oral and esophageal candidiasis, and carcinoma of the cervix. Which intervention is the nurse's priority?

7 :
Which protective mechanism of the gastrointestinal tract is blunted by the use of ibuprofen (Motrin)?

8 :
A patient in septic shock is receiving several antibiotics and total parenteral nutrition (TPN). Which patient assessment findings indicate a potentially lethal complication of the pharmacotherapy? (Select all that apply.)

9 :
Which antilipemic medication reduces serum cholesterol by inhibiting its absorption in the small intestine?

10 :
A patient is taking cotrimoxazole (Bactrim) for a urinary tract infection. Which finding should the nurse instruct the patient to report as the best indication of crystalluria?