Final answer:
To manage nausea caused by levodopa medication therapy for Parkinson's disease, the client should take an antiemetic.
Step-by-step explanation:
The client who recently began medication therapy with levodopa for Parkinson's disease is experiencing nausea. To manage this problem, the nurse reminds the client to take an antiemetic. An antiemetic is a medication specifically designed to alleviate nausea and vomiting. It can help to reduce the unpleasant symptoms and improve the client's overall comfort.