A nurse is teaching a client who has a new prescription for lovastatin. Which of the following diagnostic tests should the nurse instruct the client to complete before starting the medication?

Choice A rationale:
Increasing potassium consumption is unrelated to cephalexin, an antibiotic. It is not a necessary precaution or action to take while on this medication.
Choice B rationale:
Applying lotion to the skin to relieve itching is not related to cephalexin use. Itching is not a common side effect of this antibiotic, so the client's statement indicates a misunderstanding of the teaching.
Choice C rationale:
Avoiding sun exposure is essential while taking cephalexin because it is known to cause photosensitivity reactions. Sun exposure can lead to severe skin reactions, so the client's statement indicates an understanding of the teaching.
Choice D rationale:
Keeping the medication refrigerated is not necessary for cephalexin oral suspension. It should be stored at room temperature unless specified otherwise by the manufacturer. The client's statement suggests a misunderstanding of the medication storage instructions.

Choice A rationale:
The nurse should not include the statement, "If your breath smells fruity, decrease your oral intake.”. in the discharge teaching for diabetic ketoacidosis. Fruity breath odor is a sign of diabetic ketoacidosis (DKA) due to ketone production. Decreasing oral intake would not address the underlying problem, and the client should be encouraged to seek medical attention promptly if experiencing this symptom.
Choice B rationale:
This is the correct choice. The nurse should instruct the client to check their urine for ketones if their blood sugar is greater than 300 milligrams per deciliter. High blood sugar levels can lead to ketone production, and monitoring ketones in the urine can help assess the severity of DKA and guide appropriate interventions.
Choice C rationale:
The statement, "Drink one liter of fluids daily.”. is not appropriate for a client with diabetic ketoacidosis. Clients with DKA often have fluid imbalances, and their fluid needs should be assessed and managed by healthcare professionals based on individual factors and laboratory values.
Choice D rationale:
The statement, "When nausea is present, drink chilled water.”. is not specific to diabetic ketoacidosis and may not be appropriate for all clients. Nausea can be caused by various factors, and addressing the underlying cause is important. Drinking chilled water may not necessarily alleviate nausea.