Which vitamin will reduce the therapeutic effects of levodopa?
B6
A
E
K
C
The Correct Answer is A
A. B6 (Pyridoxine):
Vitamin B6, also known as pyridoxine, is known to reduce the therapeutic effects of levodopa. It competes with levodopa for absorption in the gastrointestinal tract and can decrease the amount of levodopa that reaches the brain, thereby diminishing its effectiveness in treating Parkinson's disease symptoms.
B. A (Retinol):
Vitamin A, also known as retinol, is not typically associated with reducing the therapeutic effects of levodopa. Vitamin A plays important roles in vision, immune function, and cellular communication, but it does not interact with levodopa in a way that affects its therapeutic efficacy.
C. E (Alpha-Tocopherol):
Vitamin E, also known as alpha-tocopherol, is an antioxidant that plays a role in protecting cells from oxidative damage. While vitamin E supplementation is sometimes used in Parkinson's disease management for its potential neuroprotective effects, it is not known to reduce the therapeutic effects of levodopa.
D. K (Phylloquinone):
Vitamin K, also known as phylloquinone, is primarily involved in blood clotting and bone metabolism. It does not interact with levodopa in a way that reduces its therapeutic effects.
E. C (Ascorbic Acid):
Vitamin C, also known as ascorbic acid, is not known to reduce the therapeutic effects of levodopa. While vitamin C has various roles in the body, including antioxidant activity and immune function support, it does not interfere with levodopa absorption or efficacy.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Increased blinking
Increased blinking is not a typical manifestation of bradykinesia. In fact, individuals with Parkinson's disease may experience reduced blinking (hypokinesia of blinking) rather than increased blinking.
B. States of euphoria
Euphoria is not typically associated with bradykinesia. Instead, individuals with Parkinson's disease may experience a range of mood changes, including depression, anxiety, or apathy, but euphoria is not a common finding.
C. Slurred speech
This is the correct answer. Slurred speech, or dysarthria, can occur in individuals with Parkinson's disease as a result of bradykinesia affecting the muscles involved in speech production. Bradykinesia can cause a reduction in the speed and coordination of movements necessary for clear speech, resulting in slurred or mumbled speech patterns.
D. Decreased respiratory rate
Decreased respiratory rate is not typically associated with bradykinesia. Bradykinesia primarily affects voluntary movements rather than involuntary processes such as respiration. While respiratory muscle weakness can occur in advanced stages of Parkinson's disease, it is not directly related to bradykinesia.
Correct Answer is A
Explanation
A. Withhold the next dose and notify the physician:
Withholding the next dose of the cholinergic agent is the appropriate immediate action because the presence of inspiratory and expiratory wheezing bilaterally suggests bronchoconstriction or bronchospasm, which can be a serious adverse reaction to the medication. Notifying the physician promptly allows for further assessment and management of the patient's respiratory symptoms. The physician may need to adjust the medication regimen, order diagnostic tests, or provide treatment for bronchoconstriction.
B. Give the next dose:
Administering the next dose of the cholinergic agent could worsen the patient's respiratory symptoms and exacerbate bronchoconstriction. This action is contraindicated in the presence of wheezing, as it may further compromise the patient's respiratory function.
C. Assess heart rate:
While assessing heart rate is an important aspect of patient assessment, it is not the priority in this scenario. The priority is to address the respiratory distress and potential bronchoconstriction associated with the cholinergic agent. Wheezing is a respiratory symptom that suggests airway obstruction, and immediate intervention is necessary to ensure adequate oxygenation and ventilation.
D. Assess blood pressure:
Similarly, while assessing blood pressure is important in patient care, it is not the priority in this situation. The priority is to address the respiratory distress and potential bronchoconstriction associated with the cholinergic agent. Wheezing indicates respiratory compromise, and prompt action is required to prevent further respiratory deterioration.
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