Which vitamin will reduce the therapeutic effects of levodopa?

Answer and Explanation

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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Correct Answer is C

Explanation

A. Diarrhea:

Diarrhea is not a common side effect of phenytoin. While gastrointestinal disturbances such as nausea, vomiting, and constipation may occur, diarrhea is less common. Therefore, it is not a primary adverse effect that the nurse should instruct the client to monitor and report.

B. Wrist pain:

Wrist pain is not a common side effect of phenytoin. Side effects related to musculoskeletal issues such as joint pain, muscle weakness, or muscle twitching can occur, but wrist pain specifically is not commonly associated with phenytoin use. Therefore, it is not a primary adverse effect that the nurse should instruct the client to monitor and report.

C. Skin rash:

Skin rash is a potential adverse effect of phenytoin that should be monitored and reported. Phenytoin can cause various skin reactions, including a mild rash or more severe reactions such as Stevens-Johnson syndrome or toxic epidermal necrolysis. Therefore, the nurse should instruct the client to promptly report any signs of skin rash or other skin changes.

D. Metallic taste:

Metallic taste is a common side effect of phenytoin. While it is not usually a serious adverse effect, it can be bothersome for some individuals. Therefore, the nurse should instruct the client to monitor for this side effect and report it if it occurs persistently or becomes bothersome.

A. A continuous seizure state in which seizures occur in rapid succession B. A sensory warning that a seizure is imminent C. A period of sleepiness following the seizure during which arousal is difficult D. A brief loss of consciousness accompanied by staring

Correct Answer is B

Explanation

A. A continuous seizure state in which seizures occur in rapid succession:

This describes status epilepticus, a medical emergency characterized by prolonged or continuous seizures. It is not related to the concept of an aura.

B. A sensory warning that a seizure is imminent:

This is the correct answer. An aura is a subjective sensation or symptom that acts as a warning sign that a seizure is about to occur. Auras can vary widely among individuals and may include visual, auditory, olfactory, or other sensory experiences.

C. A period of sleepiness following the seizure during which arousal is difficult:

This describes the postictal state, which occurs after a seizure. During this period, the individual may experience confusion, drowsiness, or difficulty arousing from sleep. It is not specifically related to the concept of an aura.

D. A brief loss of consciousness accompanied by staring:

This describes an absence seizure, characterized by a brief loss of awareness and a blank stare. Absence seizures typically do not have an aura preceding them.

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Which vitamin will reduce the therapeutic effects of levodopa?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is reinforcing teaching a client who has a new prescription for phenytoin. The nurse should instruct the client to monitor and report which of the following adverse effects of this medication?

Correct Answer is C

Explanation

A nurse is caring for a client who has a seizure disorder and reports experiencing an aura. The nurse should recognize the client is experiencing which of the following conditions?

Correct Answer is B

Explanation

A nurse is reinforcing teaching with a client who is taking benztropine to treat Parkinson's disease. The nurse should instruct the client to report which of the following findings as an adverse effect of the medication?

Which condition would indicate to the nurse that the patient has a phenytoin (Dilantin) toxicity?

Which position should a nurse instruct a patient to assume after a lumbar puncture to prevent a headache?

A patient is stuporous but reacts by withdrawing from painful stimuli. Which term is most appropriate for this patient?

An acute care nurse is caring for an adult client who is undergoing evaluation for a possible brain tumor. While performing a neurological examination, which of following findings is the earliest indicator of the client's cerebral status?

The nurse is caring for a patient taking a cholinergic agent. When auscultating lung sounds, the nurse notes inspiratory and expiratory wheezing bilaterally. The best action for the nurse to take would be to:

A nurse is preparing to administer phenytoin 75 mg PO. Available is phenytoin suspension 25 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

A nurse is preparing to administer valproic acid 500 mg PO. Available is valproic acid oral solution 250 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)