A nurse is preparing to administer lurasidone 120 mg PO for a client who has schizophrenia.

Available is lurasidone 40 mg tablets.

How many tablets should the nurse administer per dose?
(Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Choice A rationale:

Switching brands of phenytoin can lead to variations in drug absorption and serum drug levels, potentially leading to a loss of seizure control or toxicity. Therefore, this is not a correct instruction.

Choice B rationale:

Altering the phenytoin administration regimen each week can lead to fluctuations in serum drug levels, potentially leading to a loss of seizure control or toxicity. Therefore, this is not a correct instruction.

Choice C rationale:

Phenytoin does not turn urine blue. This is a side effect associated with some other medications, but not phenytoin. Therefore, this is not a correct instruction.

Choice D rationale:

Alcohol can increase serum phenytoin levels, potentially leading to toxicity. Therefore, this is a correct instruction.

So, the correct answer is D. Alcohol increases the chance of phenytoin toxicity.

Choice A rationale:

Withholding the dose if having a fine hand tremor is not recommended. Hand tremors are a common side effect of lithium, but they can be managed by adjusting the dose.

Choice B rationale:

Avoiding foods with a high tyramine content is not necessary for lithium users. This dietary restriction is typically associated with certain antidepressants, not lithium.

Choice C rationale:

Limiting daily fluid intake is incorrect. Lithium can cause increased thirst and urination, so it’s important to maintain adequate hydration.

Choice D rationale:

Following a low-sodium diet is not advised. Both salt and fluid can affect the levels of lithium in your blood, so it’s important to consume a steady amount every day.

So, the correct answer is, none of the above.