A nurse is caring for a client who has dementia and has a prescription for levodopa. Which of the following types of dementia should the nurse identify that the client has?

A. Levodopa is a dopaminergic medication used to treat the motor symptoms of Parkinson’s disease dementia (PDD). In Parkinson’s disease, degeneration of dopaminergic neurons in the substantia nigra leads to motor symptoms such as bradykinesia, rigidity, and tremor. When cognitive decline develops after the onset of Parkinson’s motor symptoms, it is classified as Parkinson’s disease dementia. Levodopa helps improve mobility and reduces parkinsonian motor deficits, indirectly supporting functional independence in clients with dementia. B. Vascular dementia results from cerebrovascular disease (e.g., strokes or chronic ischemia) and is not treated with levodopa. Management focuses on controlling cardiovascular risk factors, such as hypertension, diabetes, and hyperlipidemia, rather than dopaminergic therapy. C. Prion disease (e.g., Creutzfeldt-Jakob disease) is a rapidly progressive neurodegenerative disorder caused by misfolded prion proteins. There is no cure or specific treatment, and levodopa is not effective for prion-related dementia. D. HIV-associated dementia is a complication of advanced HIV infection affecting the central nervous system. Management includes antiretroviral therapy rather than dopaminergic agents like levodopa.