Nokea
Which of the following drugs should be avoided in a pregnant woman because of a risk of harming the fetus?
- A. Pravastatin
- B. Cholestyramine
- C. Gemfibrozil
- D. Niacin
Correct Answer: A
Rationale: Statins like pravastatin are contraindicated in pregnancy due to potential teratogenic effects.
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The term 'chemical antagonism' means that:
- A. two drugs combine with one another to form an inactive compound
- B. two drugs combine with one another to form a more active compound
- C. two drugs combine with one another to form a more water soluble compound
- D. two drugs combine with one another to form a more fat soluble compound
Correct Answer: A
Rationale: Chemical antagonism involves a direct chemical interaction rendering the drug inactive, e.g., chelation.
Which action will the nurse take if a dosage is unclear on a health care provider's order?
- A. Ask the patient what dosage was given in the past.
- B. Ask another physician to determine the correct dosage.
- C. Tell the patient that the medication will not be given.
- D. Contact the health care provider to verify the correct dosage.
Correct Answer: D
Rationale: Any questionable orders should be verified by the health care provider who wrote the orders. The patient is not a reliable source of verification. The physician who wrote the order should verify it. It would be a medication error to withhold the dose instead of verifying it.
After a few weeks on a drug, a patient reports profound thirst and the production of large volumes of dilute urine (polyuria). Which of the following drugs is most likely responsible for the symptoms?
- A. Diazepam
- B. Fluoxetine
- C. Haloperidol
- D. Lithium
Correct Answer: D
Rationale: Lithium causes nephrogenic diabetes insipidus, leading to thirst and polyuria.
A patient who has AIDS is at risk to contract aspergillosis. The nurse will anticipate that which antifungal medication will be ordered prophylactically for this patient?
- A. Metronidazole (Flagyl)
- B. Micafungin (Mycamine)
- C. Posaconazole (Noxafil)
- D. Voriconazole (Vfend)
Correct Answer: C
Rationale: Posaconazole prevents Aspergillus in AIDS; micafungin or voriconazole treat, not prevent. Posaconazole is given for prophylactic treatment of Aspergillus and Candida infections.
A nurse is monitoring a client who is receiving spironolactone. Which of the following findings should the nurse report to the provider?
- A. Serum Sodium 144 mEq/L
- B. Urine output 120 mL in 4 hr
- C. Serum Potassium 5.2 mEq/L
- D. Blood Pressure 140/90 mm Hg
Correct Answer: C
Rationale: Hyperkalemia (5.2 mEq/L, C) is a serious side effect of spironolactone, a potassium-sparing diuretic.