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

Use alcohol in small amounts only. Report yellow eyes or skin immediately.Increase intake of Swiss or aged cheeses.Avoid vitamin supplements during therapy.

Explanation.

Isoniazid is hepatotoxic, and therefore the client is taught to report signs and symptoms of hepatitis immediately, which include yellow skin and sclera. For the same reason, alcohol should be avoided during therapy. The client should avoid intake of Swiss cheese, fish such as tuna, and foods containing tyramine because they may cause a reaction characterized by redness and itching of the skin, flushing, sweating, tachycardia, headache, or lightheadedness. The client can avoid developing peripheral neuritis by increasing the intake of pyridoxine (vitamin B6) during the course of isoniazid therapy.