Which medication is commonly used in the treatment of multiple sclerosis?
Pyridostigmine
Levodopa-carbidopa
Riluzole
Interferon-beta
The Correct Answer is D
A. Pyridostigmine is primarily used in the treatment of myasthenia gravis, a different autoimmune neuromuscular disorder characterized by weakness of voluntary muscles. It works by inhibiting the
enzyme acetylcholinesterase, which increases the levels of acetylcholine at neuromuscular junctions, thereby improving muscle strength. It is not used for treating multiple sclerosis.
B. Levodopa-carbidopa is commonly used to treat Parkinson’s disease. Levodopa is converted to dopamine in the brain, and carbidopa prevents levodopa from being converted into dopamine before it reaches the brain. This combination helps manage the motor symptoms of Parkinson’s disease. It is not used for multiple sclerosis.
C. Riluzole is used primarily for the treatment of amyotrophic lateral sclerosis (ALS), a neurodegenerative disease affecting motor neurons. It works by reducing the release of glutamate, a neurotransmitter that can be toxic to nerve cells. Riluzole is not used for multiple sclerosis.
D. Interferon-beta is a disease-modifying therapy used in the treatment of multiple sclerosis. It works by modulating the immune system to reduce the frequency and severity of MS relapses. Interferon-beta can help slow the progression of disability and reduce the number of new lesions seen on MRI scans.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. This would indicate adrenal insufficiency, not Cushing syndrome.
B. Elevated adrenocorticotropic hormone (ACTH) and elevated cortisol would indicate Cushing syndrome caused by pituitary adenoma, not adrenal gland hyperplasia.
C. Low adrenocorticotropic hormone (ACTH) and elevated cortisol is consistent with Cushing syndrome caused by adrenal gland hyperplasia. In this condition, the adrenal glands produce excess cortisol independently of ACTH stimulation.
D. Elevated adrenocorticotropic hormone (ACTH) and low cortisol would indicate adrenal insufficiency, not Cushing syndrome.
Correct Answer is D
Explanation
A. Hemoglobin levels measure the oxygen-carrying capacity of the blood. A reduced ejection fraction (30%) is more closely related to heart failure or significant cardiac dysfunction, which is not directly indicated by changes in hemoglobin levels.
B. Platelet levels are primarily involved in blood clotting and are less directly related to ejection fraction. Elevated or decreased platelet counts are not typically used as indicators of heart failure severity or reduced ejection fraction.
C. In cases of severe heart failure with a reduced ejection fraction, you may see elevated BUN levels due to these effects. However, it is not directly related to heart failure.
D. BNP is a hormone released by the heart in response to increased pressure and volume overload, typically seen in heart failure. Elevated BNP levels are associated with worsening heart failure and can be elevated in patients with a reduced ejection fraction. In heart failure, especially with an ejection fraction as low as 30%, BNP levels are often significantly elevated.
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