A client is to begin a 6-month course of therapy with isoniazid. The nurse should plan to provide which information to the client?

A. Respiratory acidosis is caused by hypoventilation, leading to an increase in carbon dioxide levels in the blood. This condition is characterized by confusion, drowsiness, and headache, but it does not typically present with vomiting, tingling, or slow respirations as described in this scenario.
B. Metabolic alkalosis occurs due to a loss of hydrogen ions or an excess of bicarbonate, commonly caused by prolonged vomiting. The symptoms described, including persistent vomiting, tingling, and slow, shallow respirations, are consistent with metabolic alkalosis.
C. Metabolic acidosis results from the accumulation of acid or loss of bicarbonate, often presenting with rapid, deep breathing (Kussmaul respirations). The client’s slow respirations and other symptoms do not align with metabolic acidosis, making this option less likely.
D. Respiratory alkalosis is caused by hyperventilation, which leads to a decrease in carbon dioxide levels. It is usually associated with rapid breathing and does not match the slow respirations and other symptoms seen in this client.

A. Avoid vitamin supplements during therapy: This is not generally advised for isoniazid therapy. In fact, vitamin B6 supplements are often recommended to prevent peripheral neuropathy caused by isoniazid.

B. Drink alcohol in small amounts only: Alcohol can increase the risk of liver toxicity when taking isoniazid. It is typically advised to avoid alcohol altogether during treatment.

C. Report yellow eyes or skin immediately: Isoniazid can cause liver toxicity, which can lead to jaundice (yellowing of the eyes and skin). This is a serious side effect and should be reported immediately to prevent further liver damage.

D. Increase intake of Swiss or aged cheeses: This recommendation is not related to isoniazid therapy. Aged cheeses are more relevant to patients on monoamine oxidase inhibitors (MAOIs) due to tyramine content.