A nurse is providing teaching to a client who is receiving intermittent parenteral phenytoin. Which of the following conditions should the nurse recognize as an indication for this medication?

A. Kidney transplant: Phenytoin is not used to prevent organ rejection or manage transplant-related complications. Immunosuppressive therapy is indicated in kidney transplants, and phenytoin does not play a role in this context. B. Endocarditis: Endocarditis is treated with antibiotics and sometimes surgical interventions, not antiepileptic drugs. Phenytoin does not address the bacterial infection or associated inflammation in the heart. C. Hypokalemia: Low potassium levels are managed with potassium supplements or dietary adjustments. Phenytoin does not correct electrolyte imbalances and is not indicated for hypokalemia. D. Seizures: Phenytoin is an antiepileptic medication used to prevent and control seizures. It stabilizes neuronal membranes and reduces the spread of seizure activity, making it appropriate for clients experiencing convulsive episodes.