Which instruction should a nurse provide for a client prescribed allopurinol?

The appropriate instruction for a client prescribed allopurinol is to drink 2 liters of water daily. This recommendation is crucial because allopurinol is commonly used to manage conditions like gout by reducing uric acid levels in the blood. Increasing fluid intake helps to facilitate the excretion of uric acid through the kidneys, reducing the risk of kidney stones and supporting overall urinary health. Staying well-hydrated is essential when taking allopurinol, as it minimizes potential side effects and enhances the drug’s effectiveness in preventing acute gout attacks.

Other options do not accurately reflect appropriate instructions for allopurinol. For instance, increasing the dosage weekly by 200mg could lead to adverse effects; dose adjustments should be made under the guidance of a healthcare provider, typically based on uric acid levels and response to treatment. The claim regarding glaucoma also lacks a direct association with allopurinol, as prolonged use is not known to cause this condition. Lastly, while a fine red rash can occur in some patients, it may indicate a more serious reaction, and treating it merely with antihistamines might not be sufficient without further medical evaluation.