A patient has been taking lithium for 1 year, and the most recent lithium level is 0.9 mEq/L. Which statement about the laboratory result is correct?

The lithium level is too low

The lithium level is therapeutic

Lithium is not usually monitored with blood levels

The lithium level is too high

Answer and Explanation

The Correct Answer is B

A. A lithium level of 0.9 mEq/L falls within the therapeutic range for lithium, so it is not too low.

B.   A lithium level of 0.9 mEq/L is within the therapeutic range for lithium maintenance therapy, which typically ranges from 0.6 to 1.2 mEq/L. Therefore, it is considered therapeutic.
C.   Lithium is commonly monitored with blood levels to ensure therapeutic efficacy and to prevent toxicity.
D.   A lithium level of 0.9 mEq/L is not too high; it is within the therapeutic range.

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Correct Answer is B

Explanation

A. Assessing the WBC count is not directly related to the administration of a nonselective adrenergic blocker. These medications primarily affect the cardiovascular system.
B. Assessing pulse and blood pressure is crucial before administering a nonselective adrenergic blocker. These medications can cause bradycardia and hypotension as side effects, so it's
important to ensure the client's baseline pulse and blood pressure are within acceptable ranges before giving the medication.
C. Assessing bowel sounds is not directly related to the administration of a nonselective adrenergic blocker. These medications primarily affect the cardiovascular system.
D. Assessing serum sodium and potassium levels is not directly related to the administration of a nonselective adrenergic blocker. These medications primarily affect the cardiovascular system.

A. Carbidopa prevents the breakdown of levodopa in the periphery. B. Carbidopa is the biologic precursor of dopamine and can penetrate into the central nervous system. C. Carbidopa allows for larger doses of levodopa to be given. D. There are concerns about drug-food interactions with levodopa therapy that do not exist with the combination therapy.

Correct Answer is A

Explanation

A. Carbidopa prevents the breakdown of levodopa in the periphery, specifically in the gastrointestinal tract and peripheral tissues, allowing more levodopa to reach the brain and be converted to dopamine. This enhances the effectiveness of levodopa therapy in managing the symptoms of Parkinson's disease.
B. Carbidopa is not the biologic precursor of dopamine. It is a peripheral decarboxylase inhibitor that does not cross the blood-brain barrier.
C. Carbidopa does not directly allow for larger doses of levodopa to be given. However, by

inhibiting the peripheral breakdown of levodopa, it enhances the availability of levodopa to the central nervous system, potentially improving therapeutic efficacy.
D. While levodopa-carbidopa combination therapy may have fewer drug-food interactions compared to levodopa alone, the primary reason for combining these medications is to enhance the effectiveness of levodopa by preventing its peripheral breakdown.

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A patient has been taking lithium for 1 year, and the most recent lithium level is 0.9 mEq/L. Which statement about the laboratory result is correct?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Before administering a client's prescribed nonselective adrenergic blocker, what should the nurse assess?

Correct Answer is B

Explanation

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Correct Answer is A

Explanation

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