A nurse is caring for a client who has an admited diagnosis of renal calculi and a medical history of hypertension and gout. The client works 6 days a week outside in temperatures between 32.2°C to 37.8°C (90°F to 100°F). Which of the following should the nurse tell the client to prevent a recurrence of renal calculi?

Step 1: The total amount of diphenhydramine required per dose is 50 mg.

Step 2: Each tablet contains 25 mg of diphenhydramine.
Step 3: To find out how many tablets are needed, we divide the total amount required by the amount in each tablet. So, 50 mg ÷ 25 mg/tablet.
Step 4: The result is 2 tablets.
So, the nurse should administer 2 tablets per dose. This is already a whole number, so no rounding is necessary.

Choice A reason: General anesthesia can impair the autonomic nervous system, which controls bladder function, leading to urinary retention. This risk is particularly high shortly after surgery.

Choice B reason: While liver failure can lead to multiple organ dysfunction, it is not directly associated with urinary retention unless there are concurrent issues affecting the urinary system.

Choice C reason: A diet high in calcium oxalate can contribute to kidney stones, which could potentially cause urinary obstruction, but it is not a direct cause of urinary retention.

Choice D reason: Antibiotics for a skin infection would not typically lead to urinary retention unless there were an allergic reaction or other rare side effects that affect the urinary system.