A nurse is providing discharge education to a client who had a calcium oxalate stone. Which dietary modification should the nurse include in the client's plan of care?

A. Allopurinol does not directly increase urine output. It is not a diuretic and is not used for that purpose.

B. Allopurinol does not dissolve existing kidney stones. It is primarily used to prevent the formation of uric acid stones, not to treat existing stones.

C. This is the correct answer. Allopurinol is a medication used to reduce the production of uric acid in the body. By lowering uric acid levels, it can help prevent the formation of uric acid stones.

D. Allopurinol does not increase the excretion of calcium. It is used specifically to address uric acid levels and prevent uric acid stone formation.

A. Calcium oxalate stones may cause pain, but they do not typically radiate to the groin. They are more likely to cause localized pain in the back or side.

B. This is the correct answer. Uric acid stones can cause sudden and severe pain that radiates from the back to the groin. The pain is often described as colicky and is associated with restlessness.

C. Struvite stones are typically associated with urinary tract infections and may not cause the sudden and severe pain described in the question.

D. Cystine stones are rare and are more likely to cause chronic, dull pain rather than sudden and severe pain.