A nursing student asks a nurse to explain the differences between amphotericin B and the azoles group of antifungal agents. Which statement by the nurse is correct?
Amphotericin B can be given orally or intravenously.
Azoles have lower toxicity than amphotericin B.
Amphotericin B increases the levels of many other drugs.
Only the azoles are broad-spectrum antifungal agents.
The correct answer is: b) Azoles have lower toxicity than amphotericin B.
The Correct Answer is B
Choice A reason: Amphotericin B is typically administered intravenously because it is poorly absorbed from the gastrointestinal tract and thus not suitable for oral administration. It is used to treat severe systemic fungal infections and is known for its potential nephrotoxicity and other adverse effects.
Choice B reason: Azoles, such as fluconazole and itraconazole, generally have lower toxicity compared to amphotericin B. They are often used as first-line treatments for many fungal infections due to their safer side effect profile. Azoles work by inhibiting the synthesis of ergosterol, an essential component of fungal cell membranes, and are available in both oral and intravenous formulations, making them more versatile in their use.
Choice C reason: While amphotericin B does have some drug interactions, it is not typically known for significantly increasing the levels of many other drugs. Instead, the primary concern with amphotericin B is its potential for nephrotoxicity and other direct adverse effects on the patient.
Choice D reason: Both amphotericin B and azoles are considered broad-spectrum antifungal agents. Amphotericin B is effective against a wide range of fungi, including many that are resistant to other antifungal agents. Azoles are also broad-spectrum and are used to treat a variety of fungal infections, but they generally have a better safety profile than amphotericin B.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Renal stones, also known as kidney stones, are a common complication of gouty arthritis. Gout is caused by the accumulation of uric acid crystals in the joints, leading to inflammation and pain. High levels of uric acid in the blood can also lead to the formation of uric acid stones in the kidneys. These stones can cause severe pain, urinary obstruction, and increase the risk of urinary tract infections. Therefore, patients with gout are at a higher risk of developing renal stones due to the elevated uric acid levels.
Choice B reason: Cholelithiasis, or gallstones, is not directly associated with gouty arthritis. Gallstones are formed from cholesterol or bilirubin in the gallbladder and are more commonly related to conditions such as obesity, diabetes, and certain liver diseases. While they can cause significant health issues, they are not a typical complication of gout.
Choice C reason: Liver failure is not a common complication of gouty arthritis. While liver disease can occur due to other underlying conditions or as a side effect of medications used to treat gout, it is not directly caused by the elevated uric acid levels or the inflammation characteristic of gout.
Choice D reason: Myocarditis, which is inflammation of the heart muscle, is not typically associated with gouty arthritis. Myocarditis can be caused by infections, autoimmune diseases, or other factors, but it is not a known complication of elevated uric acid levels or gout.
Correct Answer is D
Explanation
Choice A reason: Chronic obstructive pulmonary disease (COPD) is a progressive lung disease characterized by airflow obstruction and is typically caused by long-term exposure to irritants such as cigarette smoke. While COPD can lead to pulmonary hypertension as a complication, it is not caused by chronic pulmonary hypertension. Therefore, chronic pulmonary hypertension does not directly cause COPD.
Choice B reason: Respiratory acidosis occurs when the lungs cannot remove enough carbon dioxide from the body, leading to a decrease in blood pH. While it can be associated with various respiratory conditions, it is not a direct complication of chronic pulmonary hypertension. Chronic pulmonary hypertension primarily affects the pressure within the pulmonary arteries and the right side of the heart rather than directly causing respiratory acidosis.
Choice C reason: Pulmonary emboli are blood clots that travel to the lungs and can cause sudden obstruction of the pulmonary arteries. While pulmonary emboli can lead to acute pulmonary hypertension, they are not typically caused by chronic pulmonary hypertension. Chronic pulmonary hypertension is usually a result of long-term conditions affecting the pulmonary vasculature, whereas pulmonary emboli are acute events.
Choice D reason: Right heart failure, also known as Cor Pulmonale, is a direct complication of chronic pulmonary hypertension. Chronic pulmonary hypertension increases the pressure in the pulmonary arteries, causing the right side of the heart to work harder to pump blood through the lungs. Over time, this increased workload can lead to right ventricular hypertrophy (thickening of the heart muscle) and eventual failure. Cor Pulmonale is a significant consequence of chronic pulmonary hypertension and can lead to symptoms such as edema, ascites, and fatigue.
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