A client with tuberculosis is being started on antituberculosis therapy with isoniazid. Before giving the client the first dose, the nurse ensures that which baseline study has been completed? 1....

A client with tuberculosis is being started on antituberculosis therapy with isoniazid. Before giving the client the first dose, the nurse ensures that which baseline study has been completed?

1. Electrolyte levels 2. Coagulation times 3. Liver enzyme levels 4. Serum creatinine level