A nurse is preparing to administer risperidone 5 mg PO.

Available is risperidone 2 mg tablets. How many tablets should the nurse administer?
(Round the answer to the nearest tenth. 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.

The correct answer is: C. Avocados.

Choice A reason: Milk, especially when fresh and not aged, is generally low in tyramine. The tyramine content in milk does not significantly increase unless the milk is fermented or nearing expiration. Therefore, 2 % milk is considered a safe option for individuals taking MAOIs.

Choice B reason: Fresh fruits like apples are typically low in tyramine. However, as fruits ripen or become overripe, their tyramine content can increase. Since the question specifies “sliced apples,” which are likely to be fresh, they would not have a high tyramine content and are considered safe for someone on MAOIs.

Choice C reason: Avocados, particularly if they are overripe, contain higher levels of tyramine compared to other foods listed. Overripe avocados can have a tyramine content that is high enough to be of concern for individuals taking MAOIs, making them the food choice with the highest tyramine content among the options provided.

Choice D reason: Celery is a low-tyramine food and is safe for consumption by individuals on MAOI therapy. There is no significant increase in tyramine content in celery, even as it ages, making it a suitable option for those with dietary restrictions related to MAOIs.