HESI RN
Pharmacology HESI
1. Cycloserine (Seromycin) is added to the medication regimen for a client with tuberculosis. Which of the following would the nurse include in the client-teaching plan regarding this medication?
- A. To take the medication after meals
- B. To return to the clinic weekly for serum drug-level testing
- C. To call the health care provider (HCP) if a skin rash occurs
- D. To restrict alcohol intake with this medication
Correct answer: B
Rationale: Cycloserine requires weekly serum drug level determinations to monitor for neurotoxicity. The medication must be taken after meals, and the client should avoid alcohol. Additionally, the client should report any signs of skin rash or central nervous system toxicity to the healthcare provider.
2. A client with hyperlipidemia is prescribed atorvastatin (Lipitor). Which instruction should the nurse include in the teaching plan?
- A. Take the medication in the morning.
- B. Avoid consuming grapefruit juice.
- C. Increase your intake of dairy products.
- D. Take the medication with food.
Correct answer: B
Rationale: The correct instruction for the nurse to include in the teaching plan is to advise the client to avoid consuming grapefruit juice. Grapefruit juice can increase the risk of atorvastatin (Lipitor) toxicity by inhibiting its metabolism. Atorvastatin is typically taken in the evening as cholesterol synthesis occurs at night. Increasing dairy intake is not specifically recommended for atorvastatin therapy, and the medication can be taken with or without food.
3. A client is taking phenytoin (Dilantin) for seizure control, and a sample for a serum drug level is drawn. Which of the following indicates a therapeutic serum drug range?
- A. 5 to 10 mcg/mL
- B. 10 to 20 mcg/mL
- C. 20 to 30 mcg/mL
- D. 30 to 40 mcg/mL
Correct answer: B
Rationale: The correct therapeutic serum drug level range for phenytoin (Dilantin) is 10 to 20 mcg/mL. This range is considered optimal for seizure control while minimizing the risk of toxicity. Monitoring drug levels helps ensure that the client is within the therapeutic range for effective treatment.
4. The clinic nurse is performing an admission assessment on a client. The nurse notes that the client is taking azelaic acid (Azelex). Because of the medication prescription, the nurse would suspect that the client is being treated for:
- A. Acne
- B. Eczema
- C. Hair loss
- D. Herpes simplex
Correct answer: A
Rationale: Azelaic acid (Azelex) is a topical medication used to treat mild to moderate acne. It works by suppressing the growth of Propionibacterium acnes and decreasing the proliferation of keratinocytes in the skin. Therefore, if a client is prescribed azelaic acid, the nurse would suspect that the client is being treated for acne.
5. A client has a prescription to take guaifenesin (Humibid) every 4 hours, as needed. The nurse determines that the client understands the most effective use of this medication if the client states that he or she will:
- A. Watch for irritability as a side effect.
- B. Take the tablet with a full glass of water.
- C. Take an extra dose if the cough is accompanied by fever.
- D. Crush the sustained-release tablet if immediate relief is needed.
Correct answer: B
Rationale: Guaifenesin is an expectorant used to help loosen mucus and make coughs more productive. Taking it with a full glass of water helps decrease the viscosity of secretions, making it easier to expel mucus from the respiratory tract. It is important not to crush sustained-release tablets, as this can alter the intended release of the medication and lead to potential adverse effects.
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