A nurse is providing teaching to a client who has a new prescription for allopurinol to treat gout. Which of the following Instructions should the nurse include in the teaching?

A. "Expect to experience a harmless rash while taking this medication": A rash is not considered a harmless side effect of allopurinol. It can indicate a serious allergic reaction, such as Stevens-Johnson syndrome, and should be reported to the healthcare provider immediately. B. "Increase your fluid intake": Increased fluid intake is important when taking allopurinol because it helps prevent the formation of uric acid crystals in the kidneys, which can lead to kidney stones. Staying well-hydrated is crucial for minimizing the risk of this complication. C. "Increase your dietary fiber intake to prevent constipation": Constipation is not a primary side effect of allopurinol. There is no direct relationship between allopurinol and the need for increased fiber intake, so this is not a specific recommendation for this medication. D. "Take one dose every hour until the pain subsides": Allopurinol is not intended to treat acute pain. It is used as a long-term treatment to prevent gout attacks by lowering uric acid levels. Acute gout pain should be managed with other medications, such as NSAIDs or colchicine, not allopurinol.