What dietary consideration should be emphasized for clients taking isoniazid?

When clients are taking isoniazid, it is essential to avoid dairy products due to the interaction between isoniazid and calcium. Isoniazid can impair the absorption of certain vitamins and minerals, particularly vitamin B6 (pyridoxine), and consuming dairy products, which are rich in calcium, can further exacerbate this issue. This interaction may lead to a decrease in the effectiveness of the medication, and clients may become more susceptible to the side effects associated with isoniazid, such as neuropathy if vitamin B6 levels drop too low.

While maintaining adequate hydration is generally important for overall health, increasing fluid intake does not directly address the concern regarding the absorption of isoniazid. Similarly, while limiting salt intake can be relevant for managing certain health conditions, it is not a specific concern related to the medication itself. Monitoring protein intake may be significant for overall nutritional status, but it is also not directly related to the interaction with isoniazid. Therefore, the emphasis on avoiding dairy products is critical for ensuring the optimal efficacy of isoniazid during tuberculosis treatment.