Question

A 21-year-old college student is prescribed doxycycline for acne vulgaris. The patient reports taking the medication with breakfast, which includes cereal, orange juice, and milk. Two weeks later, she returns complaining that her acne has not improved and she has been experiencing frequent sunburns even with minimal sun exposure. What is the most appropriate nursing intervention?

Answer 1

Correct Answers:

Educate the patient on avoiding dairy and using sunscreen due to photosensitivity

Rationale :

🌞Doxycycline is a tetracycline antibiotic known for causing photosensitivity, making patients more prone to sunburn even with limited exposure.

🥛Calcium-rich foods like milk can bind with doxycycline, forming non-absorbable chelates, which decrease its bioavailability and reduce therapeutic effects.

📉The patient’s lack of improvement in acne indicates reduced drug efficacy, likely from improper administration with dairy and acidic juices.

🌡️Orange juice increases gastric acidity and may further hinder absorption of acid-sensitive drugs like doxycycline.

📌Core Message

Tetracyclines like doxycycline must be taken without dairy and require sun protection due to their photosensitizing and absorption-limiting properties.

Answer 2

Correct Answers:

Withhold the medication and notify the provider of potential over-replacement

Rationale :

💊Levothyroxine replaces thyroid hormone, and excessive dosing can lead to symptoms of thyrotoxicosis such as palpitations, insomnia, weight loss, and anxiety.

⚠️These signs point to over-replacement, which can increase the risk of cardiac complications and osteoporosis, especially in older clients.

📞Immediate action involves withholding the medication and notifying the provider to adjust the dose or reassess TSH levels.

⛔Reassurance or changing administration time does not address the risk of hormonal excess and can delay appropriate intervention.

📌Core Message

Excess levothyroxine can cause thyrotoxicosis, requiring immediate dose reassessment to prevent systemic complications.

Answer 3

Correct Answers:

Educating on adherence to prevent resistance

Rationale :

📉A rise in viral load and a drop in CD4 count suggest nonadherence, which increases the risk of drug resistance in HIV management.

📚Education is essential to reinforce the importance of consistent ART use in suppressing viral replication and maintaining immune function.

🧬Immediate regimen changes without resistance testing may promote further resistance or drug failure.

📆Rebuilding therapeutic adherence is the first priority before considering other interventions.

📌Core Message

Client education is essential to restore antiretroviral adherence and prevent drug resistance and immunosuppression in HIV.

Answer 4

Correct Answers:

Withhold the drug and contact the prescriber due to potential cross-reactivity

Rationale :

💥A history of severe urticaria and rash after penicillin use suggests a possible Type I hypersensitivity, which can extend to beta-lactams like amoxicillin.

⚠️Amoxicillin is a penicillin derivative, and cross-reactivity between penicillin and similar antibiotics is well-documented.

📞The safest step is to withhold the drug and contact the provider to prevent a serious allergic reaction.

🩺Close monitoring or pre-treatment with antihistamines does not eliminate the risk of anaphylaxis.

📌Core Message

A known penicillin allergy requires withholding related antibiotics like amoxicillin due to cross-reactivity risks.

Answer 5

Correct Answers:

"Always carry injectable corticosteroids and wear a medical alert bracelet."

Rationale :

💉Hydrocortisone is a lifesaving hormone replacement in Addison’s disease, and during stress, infection, or trauma, higher doses may be needed.

🆘Clients are at risk of adrenal crisis, which can be fatal if not treated promptly with injectable corticosteroids.

📿Wearing a medical alert bracelet ensures emergency responders are aware of the need for steroids in emergencies.

⚠️Tapering without supervision or skipping doses during stress can lead to life-threatening cortisol deficiency.

📌Core Message

Patients with Addison’s disease must carry injectable hydrocortisone and wear medical ID to prevent adrenal crisis.

Answer 6

Correct Answers:

"Unregulated intake of fermented and aged products can precipitate a hypertensive crisis due to tyramine accumulation."

Rationale :

⚠️Phenelzine is a monoamine oxidase inhibitor (MAOI) that inhibits the breakdown of tyramine, found in aged and fermented foods.

💣Excess tyramine causes vasoconstriction and hypertensive crisis, a life-threatening complication.

📚Client education should focus on strict dietary restrictions to avoid interactions with fermented, aged, and cured products.

🧠This adverse effect is related to the mechanism of action of MAOIs in the CNS and periphery.

📌Core Message

MAOIs like phenelzine require strict tyramine restriction to avoid hypertensive crises from food-drug interactions.

Answer 7

Correct Answers:

The client is exhibiting neurotoxic effects of lithium and requires immediate dose adjustment or hospitalization.

Rationale :

🧍‍♂️Tremors, slurred speech, and ataxia are signs of lithium toxicity, particularly when levels exceed 1.5 mEq/L.

🚨At 2.0 mEq/L, toxicity is moderate to severe, requiring urgent medical intervention, possibly including IV fluids or hemodialysis.

💊The narrow therapeutic index of lithium necessitates close monitoring of blood levels and renal function.

🧪These symptoms are not transient and are indicative of central nervous system toxicity, not a subtherapeutic effect.

📌Core Message

A lithium level of 2.0 mEq/L with neurological symptoms signals toxicity, requiring immediate intervention.

Answer 8

Correct Answers:

"Use broad-spectrum sunscreen and avoid prolonged sun exposure during therapy."

Rationale :

🌞Doxycycline causes photosensitivity, increasing risk of sunburns and phototoxic reactions, especially with sun exposure.

🧴Preventative measures include using sunscreen and avoiding peak UV exposure while on therapy.

🥛Taking the medication with dairy impairs absorption, while stopping early promotes resistance.

🚫It is not recommended in pregnancy due to risks of tooth discoloration and bone development issues.

📌Core Message

Doxycycline therapy requires sun protection due to photosensitivity, and avoidance of UV exposure is essential.

Answer 9

Correct Answers:

Drug is contraindicated in renal impairment

Rationale :

🚫Atovaquone-proguanil is not recommended in clients with severe renal impairment (CrCl <30 mL/min) due to altered drug clearance.

🩺Proguanil is renally cleared and can accumulate, increasing the risk of toxicity or ineffectiveness.

⚠️The priority is to assess renal function before initiating this regimen and consider alternative prophylaxis.

💊Although other risks may exist, renal contraindication is most urgent in determining therapy appropriateness.

📌Core Message

Atovaquone-proguanil is contraindicated in renal impairment, making renal function assessment essential for safety.

Answer 10

Correct Answers:

Hypokalemia

Rationale :

💧Amphotericin B is known to cause renal tubular damage, resulting in potassium wasting and leading to hypokalemia.

🧪This is one of its most common and serious adverse effects, requiring regular monitoring of electrolytes.

⚡Low potassium increases the risk of cardiac arrhythmias and muscle weakness, especially during long IV courses.

📉Supplementation may be needed to maintain electrolyte balance during treatment.

📌Core Message

IV amphotericin B commonly causes hypokalemia due to renal potassium wasting, requiring close monitoring.

RN Pharmacology 2025 Exam-1

No.

2 :
A patient with hypothyroidism is prescribed levothyroxine (Synthroid). After several weeks of therapy, they report anxiety, insomnia, weight loss, and palpitations. Which nursing action is most appropriate?

3 :
A patient with HIV is noncompliant with antiretroviral therapy (ART). The viral load has increased and CD4 count dropped. What should the nurse prioritize?

4 :
A nurse reviews a client's medication profile and prepares to administer amoxicillin. The client discloses a history of severe urticaria and rash following penicillin use. What is the nurse's priority action based on advanced pharmacologic knowledge and risk assessment?

5 :
In preparing a teaching plan for a client newly prescribed hydrocortisone for Addison’s disease, which instruction is essential for the nurse to include?

7 :
A client taking lithium for bipolar disorder presents with new-onset tremors, slurred speech, and unsteady gait. Laboratory findings reveal a lithium level of 2.0 mEq/L. What is the most urgent implication of this finding?

8 :
A client prescribed doxycycline for a skin infection asks about lifestyle precautions. Which instruction demonstrates the nurse's understanding of the medication?

9 :
A patient is being treated with atovaquone-proguanil for malaria prevention. He has a history of chronic kidney disease. What is the priority nursing consideration?

10 :
Which electrolyte imbalance is most common in a client receiving IV amphotericin B for systemic mycosis?

RN Pharmacology 2025 Exam-1

No.

2 : A patient with hypothyroidism is prescribed levothyroxine (Synthroid). After several weeks of therapy, they report anxiety, insomnia, weight loss, and palpitations. Which nursing action is most appropriate?

3 : A patient with HIV is noncompliant with antiretroviral therapy (ART). The viral load has increased and CD4 count dropped. What should the nurse prioritize?

4 : A nurse reviews a client's medication profile and prepares to administer amoxicillin. The client discloses a history of severe urticaria and rash following penicillin use. What is the nurse's priority action based on advanced pharmacologic knowledge and risk assessment?

5 : In preparing a teaching plan for a client newly prescribed hydrocortisone for Addison’s disease, which instruction is essential for the nurse to include?

7 : A client taking lithium for bipolar disorder presents with new-onset tremors, slurred speech, and unsteady gait. Laboratory findings reveal a lithium level of 2.0 mEq/L. What is the most urgent implication of this finding?

8 : A client prescribed doxycycline for a skin infection asks about lifestyle precautions. Which instruction demonstrates the nurse's understanding of the medication?

9 : A patient is being treated with atovaquone-proguanil for malaria prevention. He has a history of chronic kidney disease. What is the priority nursing consideration?

10 : Which electrolyte imbalance is most common in a client receiving IV amphotericin B for systemic mycosis?

2 :
A patient with hypothyroidism is prescribed levothyroxine (Synthroid). After several weeks of therapy, they report anxiety, insomnia, weight loss, and palpitations. Which nursing action is most appropriate?

3 :
A patient with HIV is noncompliant with antiretroviral therapy (ART). The viral load has increased and CD4 count dropped. What should the nurse prioritize?

4 :
A nurse reviews a client's medication profile and prepares to administer amoxicillin. The client discloses a history of severe urticaria and rash following penicillin use. What is the nurse's priority action based on advanced pharmacologic knowledge and risk assessment?

5 :
In preparing a teaching plan for a client newly prescribed hydrocortisone for Addison’s disease, which instruction is essential for the nurse to include?

7 :
A client taking lithium for bipolar disorder presents with new-onset tremors, slurred speech, and unsteady gait. Laboratory findings reveal a lithium level of 2.0 mEq/L. What is the most urgent implication of this finding?

8 :
A client prescribed doxycycline for a skin infection asks about lifestyle precautions. Which instruction demonstrates the nurse's understanding of the medication?

9 :
A patient is being treated with atovaquone-proguanil for malaria prevention. He has a history of chronic kidney disease. What is the priority nursing consideration?

10 :
Which electrolyte imbalance is most common in a client receiving IV amphotericin B for systemic mycosis?