A nurse is caring for a patient with Parkinson's disease who has been prescribed carbidopa/levodopa. The patient reports new onset of hallucinations and impulsive behaviors. Which nursing action is the most appropriate priority?

A. Instruct the patient to discontinue the medication immediately to prevent further side effects: Abruptly stopping carbidopa/levodopa can worsen Parkinson’s symptoms and may cause withdrawal-like effects. Medication changes should always be guided by the healthcare provider. B. Reassure the patient that mood changes are common and do not require further action: Hallucinations and impulsive behaviors are serious neuropsychiatric side effects of carbidopa/levodopa. Ignoring these symptoms can put the patient and others at risk; reassurance alone is insufficient. C. Advise the patient to increase dietary protein to reduce medication side effects: While dietary protein can affect levodopa absorption, it does not prevent neuropsychiatric side effects such as hallucinations or impulsivity. Adjusting protein intake is not a primary intervention for these symptoms. D. Assess and report these neuropsychiatric symptoms to the healthcare provider promptly: Hallucinations and impulsive behaviors may indicate adverse effects or toxicity from carbidopa/levodopa. Prompt assessment and communication with the healthcare provider allow for timely intervention, such as dose adjustment or alternative therapy, ensuring patient safety.