A nurse is caring for a patient with rheumatoid arthritis. The patient is prescribed hydroxychloroquine to slow the progression of the disease. Which of the following laboratory results should the nurse monitor for this patient?

Choice A rationale:
Phenytoin is an anticonvulsant medication that is typically used long-term to control seizures. It is not a medication that can be stopped abruptly, as this can lead to the recurrence of seizures or even status epilepticus, a life-threatening condition characterized by continuous seizure activity.
The client's statement, "I'll be glad when I can stop taking this medicine," indicates a lack of understanding about the long- term nature of phenytoin therapy and the potential risks associated with stopping the medication prematurely.
Further teaching is needed to emphasize the importance of medication adherence and the potential consequences of non- adherence.

Choice B rationale:
Phenytoin can cause gingival hyperplasia (overgrowth of gum tissue), so it is important for clients taking this medication to see a dentist regularly for checkups and cleanings.
The client's statement, "I have made an appointment to see my dentist next week," indicates an understanding of this potential side effect and the need for regular dental care.

Choice C rationale:
Phenytoin has a narrow therapeutic index, meaning that there is a small difference between the effective dose and the toxic dose.
Switching brands of phenytoin can lead to changes in blood levels of the medication, which could potentially result in therapeutic failure or toxicity.
The client's statement, "I know that I cannot switch brands of this medication," indicates an understanding of this important safety consideration.

Choice D rationale:
Phenytoin can interact with many other medications, including over-the-counter medications and herbal supplements.
It is important for clients taking phenytoin to notify their doctor before taking any other medications to avoid potential drug interactions.
The client's statement, "I will notify my doctor before taking any other medications," indicates an understanding of this potential risk.

Rationale for Choice A:
Tachypnea and restlessness are common signs of respiratory distress, which is a potential complication of pneumonia. These signs indicate that the client's oxygenation may be compromised and require immediate attention.

Rationale for Choice B:
Weight loss of 1 pound since yesterday is a non-specific finding and could be due to a variety of factors, including poor appetite, dehydration, or muscle wasting. While weight loss can be a symptom of HIV infection, it is not an acute sign that requires immediate prioritization in this case.

Rationale for Choice C:
Frequent loose stools can be a symptom of HIV infection or a side effect of certain medications. However, it is not an acute sign that requires immediate prioritization in this case, especially in the context of the client's respiratory distress.

Rationale for Choice D:
An oral temperature of 100°F is a low-grade fever and is not a specific indicator of any serious condition. While fever can be a symptom of pneumonia, it is not the most concerning finding in this case.
Therefore, based on the client's presenting symptoms, tachypnea and restlessness are the most concerning findings and should be prioritized by the nurse.