The nurse informs the patient to remain well hydrated while taking lithium because dehydration can lead to:

Lithium toxicity

Increased effectiveness

The need to increase the lithium dosage

Lower serum lithium levels

Answer and Explanation

The Correct Answer is A

A. Lithium toxicity can occur if the patient becomes dehydrated while taking lithium, as dehydration can lead to higher concentrations of lithium in the blood.

B. Increased effectiveness is not a consequence of dehydration while taking lithium.

C. Dehydration would not typically lead to the need to increase the lithium dosage but rather to the risk of toxicity.

D. Dehydration can lead to higher, not lower, serum lithium levels, increasing the risk of toxicity.

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Correct Answer is C

Explanation

A. Orange juice does not interact with simvastatin and does not need to be avoided.

B. Coenzyme Q10 (CoQ10) supplements are sometimes taken by patients on statins to help alleviate the side effects like muscle pain, but they do not need to be avoided.

C. Grapefruit juice should be avoided while taking simvastatin because it contains compounds that interfere with the enzymes that metabolize statins, potentially leading to increased drug levels and greater risk of side effects such as muscle damage.

D. Not all fruit juices interact with simvastatin; the specific concern is with grapefruit juice.

A. GABA and serotonin B. Epinephrine and norepinephrine C. Norepinephrine and serotonin D. Reticular formation

Correct Answer is C

Explanation

A. GABA (gamma-aminobutyric acid) is not typically targeted by antidepressants.

B. While some antidepressants may indirectly affect epinephrine and norepinephrine levels, the primary mechanism of action for most antidepressants is through increasing levels of serotonin and/or norepinephrine.

C. Antidepressants commonly work by increasing the levels of neurotransmitters such as norepinephrine and serotonin in the brain.

D. The reticular formation is not directly involved in the mechanism of action of antidepressants.

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The nurse informs the patient to remain well hydrated while taking lithium because dehydration can lead to:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse is caring for a client who is taking simvastatin (Zocor). What should the nurse instruct this client to avoid while taking this medication?

Correct Answer is C

Explanation

A patient asks how most antidepressants work. The nurse responds by saying that antidepressants improve mood by increasing levels of:

Correct Answer is C

Explanation

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