A nurse is caring for a client who is taking allopurinol. Which of the following laboratory findings indicates the medication has been effective?

A. Decreased triglycerides: Allopurinol is not used to treat triglyceride levels. B. Decreased uric acid: Allopurinol works by decreasing uric acid levels, which is important in the treatment of gout. C. Increased albumin: Allopurinol does not directly affect albumin levels. D. Increased potassium: Allopurinol does not have a direct effect on potassium levels.